Come on now John. You well know what the JFK Assassination Images show with respect to Umbrella Man and the JFK Limo. Stop lowering yourself to the level of Groden. Fold up the card table and stop with the "Three-Card Monty" routine. You're far better than this. I've seen it.
Well actually, Umbrella Man has never been a high priority to me because having a guy with an Umbrella making an obvious political statement makes far more sense than using the umbrella as a signal or heaven help us a concealed blow dart, but whatever.
Anyway, Witt's facial structure and body type 15 years later is still an extremely close match for Umbrella Man and the fact that he remembers most of what happened without a pedantic level of detail, in my opinion paints a picture of a normal bloke trying his best to remember a tiny slice of time from a decade and a half ago. Consider if Witt was some JFK fanatic who knew every detail with pinpoint accuracy then that all by itself would be powerful evidence of an impostor.
It reminds me of the eyewitnesses at the assassination, they all viewed an unexpected event once whereas the modern researcher has a ton of points of view from films and photos which they have studied over and over with microscopic detail but when some eyewitness makes some sort of a relatively insignificant error they are dragged over the coals for it? Go figure?
Getting back to the point of this post, when I grabbed the cropped image, I quickly checked the Bronson 8mm film and forgot that Bronson was also taking photographs and snapped the following photo a half second before the Limo reached Witt(my bad), before Bronson a literal second later swapped back to his movie camera.

JohnM