A for a. Everyone has a hobby
A for b. Normal CSS is boring.
a for c. Napoleon complex combined with an outlet to vent with power as I'm sure like any genius, he has some form of disability mixed with a side of intellectual depression.
Did you know that intelligent people are more prone to depression then an average human.
Edit: in his defense zm is a great place as he can do all his physics experiments with vending machines and chairs!!!!
Example scenario: " hmmmm this vending machine seems to fall at terminal velocity when I shot it over with a al..... Fuckkkk I got tagged! ( rage kick slay burn)"