Foul Play is a bit overrated, I think. Sure, there's some good chemistry between Chevy and Goldie, and cute turns by Dudley Moore as a would-be swinger and Billy Barty as an overbearing Bible salesman. But the whole thing -- well, I've just never found it that hilarious. Certainly not in the same league as What's Up, Doc? Now, THAT picture is funny!
The best thing about "What's up Doc?" are the out-takes, most notably those showing director Peter Bogdanovich playing the Barbara Streisand role in rehearsals with Ryan O'Neil.