How did Frankenheimer do the...
***SPOILER AHEAD***
...scene with the exhaust piece falling off and going straight down the Monza banking and hitting the Ferrari?
Anybody ever read anything about how it was done? In today's world, I wouldn't think twice about it because I'd know it was CGI.
I wonder if they experimented with a rearward shot from the camera car, dropping a piece of exhaust from a certain point on the banking until they knew exactly how far back the Ferrari should be in order for the piece to hit it.