Name the movie based only on the punchline.

“I’m kicking my ass! Do ya mind?”

Liar Liar

Sure. Mine was:

“Never ever in my fucking life has anyone ever been as fucking rude to me as you.”

Grosse Pointe Blank. One of my favourite movies.

The Shawshank Redemption.

“Why would they want the Duke’s son killed?”

“Don’t ever hit your mother with a shovel. It will leave a dull impression on her mind.”

Argh. I know this one. I just watched it in the last couple of months…

Dune.

Mine still unanswered:

“Don’t you want to hear my last words?”
“I just did.”

Heist

Mine:
“But this one’s eating my popcorn!”

(extra credit for both answers I know of)

Lock, Stock and Two Smoking Barrels.

“Now I get to live the rest of my life like a schnook.”

Butch Cassidy and The Sundance Kid.

"Look at the world and tell me the pleasures of sanity. "

Goodfellas

Mine:

“What family doesn’t have its… ups and downs?”

Goodfellas – the last line in the film (which arguably makes it a punchline)

“That’s the stupidest thing I’ve heard in my entire life”

“I know I’m gonna use good judgement. I haven’t lost my temper in 40 years, but pilgrim you caused a lot of trouble this monring, might have got somebody killed… and somebody oughta belt you in the mouth. But I won’t, I won’t. The hell I won’t”

Which was called Habeas Corpus.

“If that was foreplay, I’m a dead man!”

John Wayne … and I want to say … “McClintock?”

What’s Up Doc?

“So what? Big Deal.”

Cocoon

If you don’t know this one, you can deduce it:

“THere was enough formic acid in his body to kill twenty men!”

um - Adventures of Buckaroo Banzai Across the 8th Dimension?

(by any chance)
“You’ve got red on you”

Excellent! (That’s non-trivial)