Debunking the "Jet Effect"?

[Dan O'meara]

That is what I said.  But I also said that what matters is the direction of the ejected matter.   The point on the head from which it ejected does not affect the direction of the recoil.

 
Of all the truly ridiculous things you've posted in your time on this forum, this is the winner.
It's on the record.
It can't be taken back.
It's great knowing that you're going to double-down on this as well.



Do you still stand by your statement that this "jet" of material is coming from the "front half of his head"?
 

[Andrew Mason]

Of all the truly ridiculous things you've posted in your time on this forum, this is the winner.
It's on the record.
It can't be taken back.
It's great knowing that you're going to double-down on this as well.



Do you still stand by your statement that this "jet" of material is coming from the "front half of his head"?
 

If you divide the head into a forward and rear section by a line from the ear to ear, it appears to me that the exit wound in the scalp is forward of that line.   

I don't know why you think that matters.  What matters is the direction that the particles of expelled matter have when they are being forced outward from the head by the pressure built up inside the skull. The recoil momentum imparted to the head/body is the vector sum of the momenta of all those particles of matter but opposite in direction. 

If you think that is ridiculous, perhaps you can explain how your understanding of high school physics causes you to reach a different conclusion.

[Mitch Todd]

Does deceleration of the limousine, moments before & during the fatal headshot, disprove the so called "Jet Effect" & explains why the President & everyone else in the vehicle moved slightly forward? In this video by Gil Jesus, between frames 312 & 313 specifically, we can see this taking place. Thoughts?

Also this debunking of Lattimer and Alvarez -

The second video debunks nothing. The first is simply wrong: the apparent relative motion caused by the limo's deceleration is over with by frame z310. Further, if you toggle back and forth between frames 312 and 313, you'll find that JFK's head moves quite a bit relative to his wife's, the Connallys' and the SS agents in the front seat. If the motion was caused by the deceleration of the car, it would have affected all of them about the same. 

[Dan O'meara]

If you divide the head into a forward and rear section by a line from the ear to ear, it appears to me that the exit wound in the scalp is forward of that line.   

I don't know why you think that matters.  What matters is the direction that the particles of expelled matter have when they are being forced outward from the head by the pressure built up inside the skull. The recoil momentum imparted to the head/body is the vector sum of the momenta of all those particles of matter but opposite in direction. 

If you think that is ridiculous, perhaps you can explain how your understanding of high school physics causes you to reach a different conclusion.

Aaaahhh...this is such a treat.
Thanks to having dealt with your issues elsewhere I knew you couldn't accept the error of your ways.
I'm just going to savour watching you dig this hole for yourself.
But first I'm going to help you out otherwise we'll get nowhere.
So, let's start off with a basic anatomy lesson.
In fact, this is as basic as it gets.
Below is a picture of JFK's head in profile.
I've eyeballed a centre-line for his head (the yellow line). It doesn't have to be exact, it's just to get a general idea.
To the left I've written the word "BACK".
To the right I've written the word "FRONT".
This is to demonstrate where the front half of his head is and where the back half of his head is.



I want you to have another look at the image below, with the anatomy lesson in mind, and tell me again - do you still think the "jet" is coming from the front half of his head?



Take your time 

[Andrew Mason]

Aaaahhh...this is such a treat.
Thanks to having dealt with your issues elsewhere I knew you couldn't accept the error of your ways.
I'm just going to savour watching you dig this hole for yourself.
But first I'm going to help you out otherwise we'll get nowhere.
So, let's start off with a basic anatomy lesson.
In fact, this is as basic as it gets.
Below is a picture of JFK's head in profile.
I've eyeballed a centre-line for his head (the yellow line). It doesn't have to be exact, it's just to get a general idea.
To the left I've written the word "BACK".
To the right I've written the word "FRONT".
This is to demonstrate where the front half of his head is and where the back half of his head is.



I want you to have another look at the image below, with the anatomy lesson in mind, and tell me again - do you still think the "jet" is coming from the front half of his head?



Take your time 

Your line is arbitrary. The back half of the skull appears to me to be intact.  Again, why do you think it matters?  Take your time to review your high school physics.

[Dan O'meara]

Your line is arbitrary. The back half of the skull appears to me to be intact.  Again, why do you think it matters?  Take your time to review your high school physics.

Your line is arbitrary.

My line is arbitrary??
I assume you're talking about the yellow centre-line in the image below:



You are suggesting that this line is somehow randomly chosen.
Nothing could be further from the truth.
A child can see that the specific purpose of this line is to demonstrate the basic principle of the 'front' and 'back' of the head.
The reason I have been forced to demonstrate such a moronically simple principle is because you are in denial about the picture below:



It is your contention that the image above shows a "jet" of material coming from the front half of JFK's head.
It clearly does not, but such is the extremity of your mentality you will simply keep insisting that it is.
The great thing is that, as you are constantly forgetting, the forum is a written record. Your foolishness is on the record.
I've reproduced the image above but added a centre-line. This line has been eyeballed but, again, it's not that far off and it demonstrates the very simple principle of the 'front' and 'back' of the head as it relates to JFK around the moment of the head shot.
Anything to the left of the centre-line as we look at the picture, is to the back half of the the head.
Anything to the right of the line is to the front half of the head:




Again, why do you think it matters?

You, John and a whole host of fools believe that JFK's head acts like a balloon that has air escaping from it and is being blown around Dealey Plaza.
It makes me cringe how embarrassing this theory is.
Like good little LNers you can't see past the AUTHORITY, namely Alvarez's shiny Nobel prize. He must be right because he has lots of complicated mathematics and physics on his side. However, there is a very basic aspect to his stupid theory - the "jet" is coming out of an object and that object will move in the opposite direction to the expulsion of the jet.
In order to determine what direction the object will move in, all we have to do is determine what direction the jet is being expelled.
So, when you ask an unbelievably stupid question like - why do you think it matters - it is because we need able to determine what direction the jet is being expelled otherwise we cannot determine what direction the object will move in as a result of the jet. A child can understand that.

Because I'm generous, I'll give you one last chance to recant your foolishness.
Is the "Jet" below being expelled from the front half of JFK's head?

[John Mytton]

At the moment of impact, Kennedy's head was leaning forward.



And as for separating Kennedy's head into halves while he was standing bolt upright is not a true reflection of Zapruder frame 312 and we must take into consideration that we are examining the upper portion of the skull itself and as is abundantly clear, whichever way you halve Kennedy's head the back section always appears intact.
 


I also wanted to have a close look at the HSCA's high contrast image as a comparison to a very early generational Zapruder frame and due to the HSCA's extreme contrast, the expelled matter along with a light mist has merged and is not an accurate representation of the main exploded matter which is forward of Kennedy's temple.



Releasing a balloon and letting the air escape through the opening as the balloon moves away from the exiting air is the jet effect in action but what if we release all the air at once? In the following GIF, the balloon first loses it's outer integrity at the bottom right near the man's left hand and then the remaining larger fragment is propelled violently away in the opposite direction to the top left of frame.




And finally, the Dealey Plaza eyewitnesses all describe this same explosion as seen in Zapruder because this is where the vast majority of matter was seen to escape.



JohnM