Working stupid

Got there too late. This guy was spewing wood dust all over the house. And for no good reason other than he was too lazy to: hook up the vacuum to his sander, to use the paper with the holes that direct the dust out of the sander, and to close the front door which allowed a stiff breeze to carry the dirt all through the house.
That bit of lazy = stupid cost him a couple hundred bucks in clean up... And worse gave me a bad bad bad attitude.
Dumb aas.