I was working as a baggage handler (Ramp Agent is the real job title, FYI), and they'd hired a guy whom everyone hated. He was lazy, stupid, and annoying.
One of the big rules when working around airplanes is you don't go anywhere near the engines while they're still running. They'll suck you right in and cut you into a million little pieces in 1 second. They put the fear of God into you about this during training, well before you get near an airplane. Once a plane pulls into the gate you wait until you have confirmation that the engine has been turned off before you approach it. If you're not sure, you don't approach the plane.
Well one day a plane pulls up to the gate, and he walks right up to the engine while it's still running. People are yelling, his vest is flapping like crazy, but he's so aloof he doesn't notice. Someone runs up to him and yanks him back to a safe distance.
They had already been building up a case to fire him, but that made it a lot easier. The supervisor walked him into the manager's office, and he was fired right away. We all rejoiced.