Visible crew/equipment: During one of the railroad men's eyewitness accounts of what he heard at the time of the assassination, for only a second on the extreme far right of the screen during the obviously re-enacted footage of the fateful motorcade, you can see just ahead and on the driver's side of the Lincoln limosuine the white sedan lead car; however, you can see it is mounted with what appears to be a boom microphone and other equipment and crew members in the car - one has a headset on.
Trivia: In JFK Wayne Knight plays Numa Bertel. In Seinfeld Wayne Knight plays Newman. In JFK he was used in Jim Garrison's demonstration of the single bullet theory. In Seinfeld he and Kramer told Jerry a story exactly the same as the single bullet theory only that it was spit that hit them not a bullet. Jerry then does the same demonstration that Jim Garrison did in JFK to explain the story. The layout is also the same in both the film and Seinfeld.
Trivia: In the scene where an FBI agent is harassing one of Garrison's investigators, Bill Brousard, the FBI agent bears a striking resemblance to the real police officer who was also "assassinated" on the same day in Dallas as JFK, Dallas Police Officer J. D. Tippet. It turns out that the actor is Tippet's brother in real life.