Puar, Yamcha and others in “Unfinished Business”

[while training with Krillin, Yamcha kicks Krillin's head and falls backward] Be careful Yamcha. Krillin's head is pretty slippery.

Yamcha

Wow Krillin. I think your head is your secret weapon.

Krillin

Yeah, maybe. But you bruised my brain.

Yamcha

Ha ha ha ha ha ha ha ha. Come on, don't be a wimp. Your head is as hard as a rock.

Krillin

Hey pal! Are you makin' fun of me!?

Yamcha

I sure am! [Yamcha kangaroo kicks Krillin in the face]