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. 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. It then follows the ups and downs he experienced in his five-year journey to jump the river. He has a series of financial and technical obstacles. Technical problems included difficulties with the car (the fuel tank kept blowing up) and the ramp he was planning to jump off (it was bumpy and not structurally sound). The financial problems were simpler; he kept running out of money an