Cinerama was originally three synchronized 35mm projectors for a very wide screen. Beginning with IAMMMMW, they started using 70mm film and a single projector.
YF is a classic. One look at Marty Feldman is enough to crack me up.
Here's a 5-minute version:
http://www.youtube.com/watch?v=2p5AG0Tqh3A
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