Joey Tribbiani: We’ll flip for it. Ducks or clowns.

Chandler Bing: Oh, we’re gonna flip for the baby?

Joey Tribbiani: You got a better idea?

Chandler Bing: All right, call it in the air.

Joey Tribbiani: Heads.

Chandler Bing: Heads, it is.

Joey Tribbiani: Yes!

Chandler Bing: We have to assign heads to something!

Joey Tribbiani: Right! Okay, okay… Ducks is heads because ducks have heads.

Chandler Bing: What kind of scary-ass clowns came to your birthday?

From Friends – Season 2 Episode 6: ‘The One with the Baby on the Bus’ (2×06)