A few folks described scenes, but I think the best replies are the ones that quoted one or two lines instead. How many do you recognize?
"Ho, ha-ha! Guard, turn, parry, dodge, spin, ha, thrust!"
"And now, having re-re-disposed of the monster, exit our hero stage left."
"Sorry, folks, we ran outta gas."
"Yeah, you know how it is with these 'A' cards."
"Would I turn on the gas if my friend Rocky were in there?"
"You might, rabbit, you might."
"Well, would I drop a lighted match in this oven if my friend Rocky were in there?"
"Well, I talk LOUD! And I carry a BIGGER stick! And I use it, too!"
(somewhat generic, but what can you do?)
"Who? Franz Liszt? Never heard of him. Wrong number."
Sign: "OK Wiseguys. NOW what do I do?"
"This is gonna cause more confusion than a mouse in a burlesque show!"
"Say, boy, you cover about as much as a flapper skirt in a high wind."
"Oh, I'm going to blow it up, it obstructs my view of Venus."
"I am ze locksmith of love, no?"
"Turn out zee lights, darling. I know where everything is."
"Pardon me, but could you out help a fellow American who's down on his luck?"
"Hit the road!"
"Why, it's Mugsy! Don't look at me like that, Mugsy! I'm your pal, Mugsy, your buddy pal! Yeah!"
"It's coitains for ya, Rocky! Coitains!"
"I'm rich! I'm socially secure!"
"Yes, you're next! You're so next!"
"Poor liddle bunny... I killed the wabbit..."
(This one was my contribution, and I still can't believe it's so far down in the thread.)
"I wonder if that silly duck will remember he can fly." WHAM!!! "Nope, guess not."