Wheelchair kryptonite

One of my favorite pasttime activites at work is editing Urban Dictionary entries. There is an olympic swimming pool worth of shit to wade through--people trying to bash each other, unamusing racial nonsense, indecipherable 1337 speak--but occasionally you come across some real gems.

stairs:

Wheelchair kryptonite.

Person: "Hey, let's go down these stairs."
Wheelchair Person: "NOOOOOOOOOOOOO!"