Jay Leno Has a Few Snappy Head Injury Bits Hamilton Nolan · 09/29/09 09:06AM Funnyman Jay Leno "cracked" (call me, Jay) some "jokes" last night about Conan O'Brien's head injury. Maybe Conan knocked himself out just so he wouldn't have to watch Jay Leno, on NBC television! That's as funny as the actual jokes.