Author's Note: Arakawa-sensei/Square Enix/Bones owns it, I just buy the stuff. Crack!like.
X is for Xing
Colonel Roy Mustang thought it would be hilarious if he put a "You must be this tall to enter my office" xing-like sign on his office door the day before Major Edward Elric returned from his mission.
Colonel Roy Mustang didn't think it was funny when Ed transmuted the door into the wall and made the windows higher than Roy, adding the sign of "Arsonists Anonymous Asylum" to the outside.
Colonel Roy Mustang learned his lesson, and gained a phobia of rooms without doors and windows taller than he was.