I don’t know much about him, but some of the scenes he had during the “Airplane” movies are almost iconic. When you repeat one of the lines to someone, they almost always laugh, and then say a different line back to you.
“Have you ever been in a Turkish prison?”
“Do you like movies about gladiators?”
ROFL
... RIP
I was watching Airplane on DVD last night and I enabled the commentary. Graves said that he thought shooting on the film would end when he uttered the line, “Have you seen a man naked?”