I never knew that City Slickers won any kind of Oscar. I'm glad too. It's such a great movie. I know comedies almost exclusively get snubbed, but that movie is way more than a comedy, and Palance's portrayal of a grizzly old rancher was wonderful.
Only thing more memorable to me was in 1974 when David Niven was hosting the Oscars and a nude streaker ran across the stage. Niven's reply was classic, "...isn't it fascinating to think that probably the only laugh that man will ever get in his life is by stripping off and showing his shortcomings?"