The human head weighs eight pounds.

4 seconds sound clip from the Jerry Maguire movie soundboard.

You can hear this line at 00:57:23.080 in the Blu-ray version of the movie.

Quote context

[...]

- I don't think it's right for him to wake up and hear some strange man's voice in the house. Some drunken stranger.

- Oh, as opposed to ten angry women?

- Lean forward. Okay, I've got it. Still edible. Change your shirt. Everything's fine.

- Hi, Jerry.

- Hi, Ray. Aren't you supposed to be in bed?

- Yeah.

- Yeah.

- All right. I won't tell.

- The human head weighs eight pounds.

- Jerry Maguire.

- I think it's this one.

- You should be dreamin' about me, baby. I should be on your mind constantly. My agent should be thinking Rod Tidwell.

- That's when the big dollars are gonna flow. That's when we truly will materialize the kwan.

[...]