At a Monster Truck event, Bart spots his hero Lance Murdock attempt to jump his motorcycle over a tank full of sharks, electric eels, a ferocious lion and one drop of blood that drives all the wild animals insane. Inspired to follow in Murdock's footsteps, Bart attempts risky skateboard jumps until he sets his sights on Springfield Gorge. Homer tries to stop Bart from jumping, only to accidentally skate off the ramp and into the gorge.