Jimmy Fallon really is unbelievable. Not only could he never get through a sketch on Saturday Night Live without laughing, yesterday he couldn't even get through our cold open with Good Charlotte. He cracked up during his second line, ran off-screen, then popped back in at the end of the skit to improv a line while still laughing. Here's hoping he jumped onto the Joe Piscopo / Victoria Jackson / Tony Rosato / Gary Kroeger train out of SNL's station, never to be heard from again.