You're so gullible, McFly!
Biff
Roads? Where we're going we don't need...roads.
Dr. Emmet Brown
Last night, Darth Vader came down from the planet Vulcan and said that if I didn't take Lorraine to the dance, that he'd melt my brain.
George
Let’s see if you bastards can do 90.
Marty
Wait a minute, Doc, are you trying to tell me that my mother has got the hots for me?
Marty McFly
Wait, hold on Doc, are you telling me that you built a time machine...out of a Delorian?
Marty McFly
What the hell is a jigawatt!?
Marty
what the hell's a jigawatt?!?
Marty
Nobody calls me chicken.