Butch Cassidy & The Sundance Kid / The Cliff Jump ["I Can't Swim!!"] (1969) -- Redford gives the funniest line of the whole movie. When he screams "I can't swim" and gives Butch that up/down look I swear Newman isn't acting. He is really cracking up. Hilarious!
"My father would womanize, he would drink, he would make outrageous claims like he invented the question mark. Some times he would accuse chestnuts of being lazy, the sort of general malaise that only the genius possess and the insane lament" Dr Evil