In this final part of the pulse jet series, an old woman's shopping bike is transformed into a bomb-inspired safety hazard. The pulse jet adds a bit of speed, but balancing the bike is challenging.

The dry lake beds of Cedarville, California, are a place where physics and common sense go to die. It’s flat, desolate, and wide open—the perfect backdrop for Bob Maddox, a man who looks at bicycles ...