In one bonus storyline in Dragon Universe, Vegeta goes behind a bush so he can do a Fusion Dance with Goku without being seen "dancing around like a fool." Goku mistakes him for... taking care of business.
Goku: Well, when you've got to go, you've got to go.
Saiyaman...justSaiyaman. His ultimate is merely him introducing himself and pulling off a pose! Do it right and he gets an attack boost. Screw it up and he looks ever so stupid.
The What If? in the first game where Cell accidentally absorbs Krillin. Made even funnier by the fact his the onlyWhat If? where the villain loses. And then it turns out it was just a nightmare Perfect Cell was having during the 10 day Cell Game waiting period.
Yamcha goes up against Cell after he's been weakened by absorbing Krillin... and stillloses.
One small one in Frieza's What If? after killing Goku. He's standing there panting...and then merely grins and "Hmph!"'s...and then you notice he had a tooth knocked out.
Goten's winpose after beating Videl. He looks so adorably concerned that Gohan'll be angry at him.
The way some pre-fight dialogue can match up even if the characters don't have special intros. case in point...
Majin Buu: Do you like chocolate? or Yamcha: Think you can handle this?
Kid/Teen Gohan: I'll give it a try!
Some of the special intros, especially...
Goten: (dancing around) Shenron, I want candy!
Omega Shenron: (Folding arms, not amused.) I don't grant wishes for candy!
Hercule is just as much as a hoot in the Budokai games as in the anime: the first two games turn his giving a bomb-laden handheld video game (as seen in the Buu saga) into one of his Ultimates, while the third adds to his repertoire an attack where, after beating his opponent, he quickly sets up a camera and takes a picture of himself standing victoriously over his foe (complete with him stomping on his opponent as they try to get back up).