What burns my butt (aside from a flame about 3 feet high ) me is folks who taxi up, park directly in front of the pumps, refuel, and them saunter away for a leisurely lunch. ( They usually don’t even instal the control locks, set the parking brake or install chocks and scream bloody murder if anyone, either fixed wing or rotary, comes within 100 feet of their aircraft. ) Especially annoying during fire fighting season.