Zapruder film
Zapruder film 18.3 frames per second
Sometimes it is hard to visualize exactly how much distance the motorcade traveled in just 1-second.
I found this segment in the Nova "Cold Case JFK" Documentary (18 - frames)
When Z133 is not the true Z133.
See if you can locate Gov. Connally with his left hand over/up-to his head from z133 on.
Triangulation using Phil Willis' position.
Station# 2+99.0 = Z133 (JFK'S position in the limo)