Forget the "hat" stuff. When Zapruder filmed that segment, it should have included our seeing the E-W section of the short wall that veers off/runs toward The Steps. This general area would be where we see the Black Dog Man on Willis 5. The SS Re-creation Filming that was done from the Zapruder Perch DOES SHOW this E-W section of the short wall. The "hat" stuff is lame misdirection. There is no such thing as the perfect crime. The SS re-creation film is proof of this. That SS film that was shot shortly after the assassination, (especially the copy posted on You Tube by Von Pein), is an absolute treasure trove.