Yamcha, Bulma and others in “Unfinished Business”

Yamcha

[the Dragon Ball is in a lake] Hey, these clothes are expensive! I'm not jumpin' in there!

What kind of lame excuse is that!? Just take them off and go in your underwear!

Yamcha

Heh heh heh. See uh...that poses a problem. Uh...I'm not wearing any. Heh...

Yeah, right! I bet you're just chickening out! Hmmm... [to Master Roshi] What about you!?

Aheh aheh...I'd definitely go if I didn't have this cold. Aheh.

The men are scared.

Android 18

Well, I'm not. But I don't feel like getting wet right now...so no.

Least you were honest about it, unlike certain others I know!