At the 17:35 mark, the hinges to Liz's (Tina Fey's) dressing room are on the outside of the door. In all other shots, the hinges are on the inside.
Having looked at the list of previous EGOT winners, Grizz, Dot Com and Kenneth conclude that they're all composers. In actuality only three (Marvin Hamlisch, Richard Rodgers, and Jonathan Tunick) are composers, while five are best known as actors (John Gielgud, Whoopi Goldberg, Helen Hayes, Audrey Hepburn and Rita Moreno) and two (Mel Brooks and Mike Nichols) are best known as directors.