Conversation so far:
what did Slim Pickens's film career consist of?
In a large number of films and TV shows, he wore his own hats and boots, and rode his own horses and mules.
who did he work with?
Steve McQueen, Tom Horn (1980), also with McQueen, Beyond the Poseidon Adventure (1979) with Michael Caine and Karl Malden.
what was his greatest accomplishment mentioned in the article?
In 1975, Pickens was in another Western, playing the evil, limping bank robber in Walt Disney's The Apple Dumpling Gang.
did he ever win any awards?
CANNOTANSWER.

Question: what was his best act?
Self-contained rewrite: what was Slim Pickens' best act?