Doing the late night talk show circuit can be a bit boring after awhile, and some actors keep it interesting by having a running gag. Paul Rudd likes to use a clip from Mac & Me in place of a clip from whatever film he is promoting. Adam Pally has a running gag of showing up to the Conan O'Brien show wearing a costume. His most recent appearance may have outdone them all as the actor from Making History walked out wearing a Batman costume that shows that the Dark Knight may have let himself go… to Krispy Kreme… a lot.
Previously Pally has appeared as James Bond, Borat, a Buckingham Palace guard and as The Mask dressed as Abe Lincoln. You can see the last one in the second video below.