Porunga, Gohan and others in “Unfinished Business”

Silence. It can't be done. The one called Goku refuses to return and says he'll come back later.

What? But why?

I know why! Because he's scared, that's why! Of the one more powerful than a Super Saiyan...his wife!

What? [holding a sword ready to strike Master Roshi]

Yikes. No, please no. It was a joke.