To celebrate CONAN O'BRIEN'S 20 years on TV, his people have released a blooper reel, with some of his favorite screw-ups over the years. 

 

It's got some amusing moments . . . in fact, even the actual running of the blooper reel gets screwed up early on, and they start it over from the beginning.  (Obviously they thought that was funny, otherwise they could've just edited it out.)