Venkman: "Igon, this reminds me of the time you tried to drill a hole through your head. Remember that?"
Igon: "That would have worked if you hadn't stopped me."
--Ghostbusters--

Earl: "Runnin' ain't a plan, Valentine. Runnin's what ya do when a plan fails."
--Tremmors--

Snake Pliskin: "Welcome to the human race."
--Escape From New York--

Roy Batty: "If only you could see what I've seen with your eyes."
--Bladerunner--

Lilu: "Me 5th Element. Me surpream being. You, no trouble."
--5th Element--

Kazan: "Gumdrops come in bags"
--Cube--

Priest: "This is a house of God. People are trying to pray."
Kurgan: "He cares about these helpless mortals..."
Priest: "Of course he cares, he died for our sins."
Kurgan: "And THAT shall be his undoing!"
--Highlander--

Mother: "Sorry to interrupt your recretions fellas, but it is time for Sgt. Pinback to feed the alien."
Pinback: "Aaaawwwww... I don't wannna do thaaaaat..."
--Dark Star--

Cat "Man! I'm sooo hungry, I just HAVE to eat!"
Lister "Rimmer's dad's died."
Cat "I prefer chicken."
--Red Dwarf--

Just to name a very few...

;-)