So apparently Gohan can let himself fight so long as he's in that super hero outfit
.
I thought Krillin being challenged like that by his wife and daughter was going to be a dream sequence or something. Just wow, being called weak by a small child. Krillin...you gotta step up now
. Though certainly a fair point. I mean if he's getting injured by a gun shot then he's really fallen.
But hey a good psychological challenge isn't a bad idea. The good old cave of the Dark Side concept being used here.