When Harry Potter ends this Summer, Daniel Radcliffe may have his fallback career already worked out. On last night's episode of Late Night With Jimmy Fallon, guest Radcliffe told Jimmy about his desire to try stand-up, so Jimmy gave him a chance right then and there. Watch "Danny Radcliffe" (as Jimmy has anointed him) as he makes his debut as a comedian - he's got one pretty good joke, even though he admits that it's a stolen one.