The greatest fear a schoolgoing child could have.
First starts off asking impossible questions and if you answer him wrong, you get defined as a dumbass by him. After that no child had the guts to answer him so he just calls everyone plain stupid.
If he plays santa claes he's one badass scary mofo.
Little boy: hi santaclaes! I made a drawing!
SantaClaes: You call that a drawing?! You little dumbass!
Little boy: But..but...
SantaClaes: BUT WHAT?! YOU BETTER SHOW ME A GOOD DRAWING BY TOMORROW, OR ILL SEND YOUR BUTT TO HELL!
Little boy: ...cancer -_-
SantaClaes: AND WHAT IS IT WITH YOU YOUNGSTER TALKING ABOUT AN ILLNES?!