Young Curly Brunette Girl With A Chair In Front Of The Wooden Door

Bicyclists often fear collision with an opening car door in case the car's occupant does not look carefully to check that it is safe to open the door. Because cyclists often ride near parked cars along the side of the road (door zone) they are particularly vulnerable to this.
Aircraft doors
Doors which lead from interior, pressurized, sections of an aircraft to exterior or unpressurized areas can pose extreme risk if they are inadvertently opened during flight. A number of accidents have occurred where aircraft doors were opened in flight: