Overconfident gentleman shows how to inflate a large tire by igniting gasoline in it

This guy sure acts like he's done this before. Watch as he pours gasoline into an uninflated tractor tire as his compatriot sticks an air compressor hose into the crack between the hub and the tire. He then ignites the explosive vapor with a torch. After the big bang the man walks over to inspect the tire, which is still flat but now on fire.

You can almost hear him thinking, "That wasn't supposed to happen."