National Lampoon's Christmas Vacation1989

Eddie:
Well, they replaced it with a plastic one 'cause every time Katherine revved up the microwave, I'd piss my pants and forget who I was for a half-hour or so. And it ain't real sturdy so... I don't know if I oughta go sailin' down no hill with nothin' between the ground and my brains but a piece of government plastic.

Clark:
Do you really think it matters, Eddie?

Eddie:
[gesturing over the left side of his head] Well, you see, the plate runs underneath my part here, and the other side... [bangs his right side] Nothing. But here, if this gets dented, then my hair just ain't gonna look right.

Clark:
Yeah, I know the feeling.