Phoenix Field airport had been subject to recurring petty thefts from neighborhood teenagers, so a security firm was retained to patrol the grounds. Thefts decreased sharply, but fuel consumption was on the rise. This puzzling situation continued until late one night, when a passerby noticed a flaming airplane on the field.
By the time the fire department arrived, the plane had completely melted into the tarmac. While they extinguished the residual flames, the passerby noticed a uniformed figure lying facedown several yards away. It was a security guard!
He was revived and questioned.
Turns out he had been siphoning fuel from small planes to use in his car. The plane he selected that night had a unique fuel storage system involving hollow, baffled wing spars. When the determined guard shoved the siphon in, it stubbed against the first baffle. No matter how he twisted, pushed, and pulled the hose, he could not siphon any fuel from the plane.
Exasperated, he lit a match to see inside the tank... and the rest is history.