At a Monster Truck event, Bart spots his hero Captain Lance Murdock, a daredevil who attempts to jump his motorcycle over a tank filled with great white sharks, electric eels, piranhas, alligators, a ferocious lion and one drop of blood that drives all the wild animals insane. Inspired to follow in Murdock's footsteps, Bart attempts increasingly risky skateboard jumps until he sets his sights on Springfield Gorge. Homer tries to stop Bart from jumping, only to find himself in danger of accidentally skating off the ramp and into the gorge.