I always wondered about that fish thing. Funny enough, they had that at the end of one of the shitty DBZ movies...

Vegeta: "Is it over yet?"
Picollo: "Not until the fish jumps"
...
*fish jumps*
Picollo: "It's over"
credits roll.

lol. That was prolly the funniest thing on DBZ...which isn't saying much come to think of it.