The Devil at Your Heels is a 1981 documentary that chronicles the attempt of the stuntman and daredevil Ken Carter to jump a rocket-powered car over the Saint Lawrence River, a distance of one mile, which would break all existing records for jumping cars.The documentary opens with some quick framing of the task, including footage of the ramp and the car to be used for the jump, and then chronicles how Carter became a daredevil, including footage of some early jumps.