Dragonball Z is : What to do when your players
characters reached the level 30, only have
artfacts as equipement and already killed half
the Gods listed in the "Deities" manual...
(Ie: "There, dear, 5 xp" (pointing at an Orc). 
"Don't bother, I will disintegrate it")

I don't agree with the "getting stronger" : I
would say that "getting sillier" is more
correct...