Why not?

This is just lots of playing around.
-with ssj hair
-Buu's insides
-and characters physically interacting with one another


I haven't seen the Inside Buu episodes in forever (part of why I wish Kai had continued on and done the rest of the series; I wanted to see them) but I do recall that Goku just kind of lingers there for a while off in his own head before Vegeta jostles him back so he'd move away.

Also, as much fun as it is to have Vegeta win, it's equally fun to have Goku mess with him. XD