ive only seen a few clips of the buu saga when goku is fighting majin vegeta and vegeta grab goku from behind and tries to slam his head into a spike then goku lets off some power stopping him then he turns around and goku does a kamemehamihar wave (u no wot i mean) and vegeta does a final flash and theres a huge explosion. i just guessed goku one he always does
but he didnt so yeah