(at around 13 mins) Jenna says she was on stage with Irene Ryan when she died. Although Irene Ryan did suffer a stroke during a performance of Pippin, she did not die until four weeks later.
At around 6:20 Tracy Morgan looks at the camera twice. First after he says "Those dudes were awesome" and then after "And so is my crack-up idea".
At 4:28, as Liz steps off the elevator, the shadow of a mic can be seen on the wall behind Jadwiga.
(at around 14 mins) In the paint can scene, Jack says "people like you and I" (in the East Coast version); this was corrected in the West Coast version to "people like you and me".