You just reminded me we used to open the hangar doors at Coningsby by pushing them with a Land rover bumper. Lot easier than winding that bloody handle
I recall the RAF banned this procedure after a civilian contractor managed to push a hangar door off its rails. The door fell on him, his tractor and one of his colleagues, who was working on a Chipmunk at the time. The hangar door flattened the lot of them.