罗德（安迪•萨姆伯格 Andy Samberg 饰）与同母异父的弟弟凯文（乔玛•塔昆 Jorma Taccone 饰），以及两个又二又丧的朋友组成了一个特技飞车小组。飞车手罗德的生活中只有两件事：继承死去的特技车手父亲的遗志，打赢强壮的继父弗兰克（伊恩•麦柯肖恩 Ian McShane 饰）。但罗德的所有特技表演几乎都沦为疯狂的自毁举动，而全副武装后的每一次挑战结果都是被弗兰克击溃。精力超级旺盛的不死之身罗德也几乎挺不住了！可这天他突然惊闻弗兰克罹患心脏病，罗德为实现弗兰克必死于自己之手的愿望，计划进行前所未有的飞车表演来为弗兰克筹集手术款，并趁机将自己暗恋已久邻家美女丹妮丝（艾拉•菲舍尔 Isla Fisher 饰）拉入了队伍。于是，一场近似于自杀的飞车表演拉开了无厘头大幕……Rod Kimble is a naïf, a slacker living in a small US town with his mom, his younger brother, and his stepfather whose respect he craves. He also misses his dead dad, whom he thinks was Evel Knievel's back-up. Rod, a man-child, believes that he is a stunt man. When his stepfather needs an operation, with help from his brother and his slacker pals, Rod hatches a plan to set a school-bus-jumping record on his moped. First, his crew and he have to raise money to rent the buses and build the ramp. Trouble is, Rod's inept at his chosen career. Looming failure is complicated by the return of Denise, Rod's next-door neighbor and secret heartthrob, who is home from college. Is public humiliation at hand?
