In about 1984 some of my colleagues arrived at LHR in a Puma after an evening's fun. Puma taxis to ramp outside a terminal, and the troop disembarks. But they didn't just get off, and saunter to the open door. They did a hot dismount, complete with defensive arc, AR16s at the ready...
By the time they were back at base the OCs phone line had melted