I kinda disagree that a comedian can get away with a tragic joke if its funny, at least THIS early, Woody Allen said it best in one his better movies "Comedy is tragedy plus time."
Dane Cook was never funny to begin with, as some of you said already he's WAY to fucking talky and just fucking drags too much. Thats not comedy, thats a headache.
And the whole TDKR is crap thing...I understand it was the weakest of the three films ,but it by no means sucked. If Dane ever is in a movie which is a commercial and critical success, makes something which makes half a billion dollars and at the very least, makes a movie which gets a fresh rating on rotten tomatoes, then he take a crack at Nolan, but definitely not now.
But hey, he thought Good Luck Chuck was a good idea...