Remember the scene where Sundance is playing poker with the guy near the beginning of the movie......The guy finds out that it's The Sundance Kid who he's playing poker with and whom he just accused of cheating. The guy then says, "I didn't know you were The Sundance Kid when I said you were cheating. If I draw on you you'll probably kill me. Sundance says, "There is that possibility."
;-)
The whole movie had brilliantly funny dialogue.
Remember when Butch and Sundance were leaving the "cat house" as they saw the posse was right on their tail. They jumped down off the tin roof of the place and came across the posse's horses. They tried to scare the horses off, but they wouldn't leave. Butch, flustered, says, "Boy, somebody sure trained 'em!"
Butch: "Just ask us to stay"
"Could you stay?"
Butch:" no we got to go"
"I've got vision and the rest of the world is wearing bifocals"