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. In the fifth year, everything was ready, but two attempts were called off — one because of a short strike by the ground crew, and one because of weather. The backers, desperate to finish, believed that Carter had lost his nerve and called him to a meeting in another city, and then brought in another driver, Kenny Powers, to attempt the jump.