When Liz first pretend-coughs to say "nerd alert" to Jack, she is standing with her back to the door. In the next shot, as she continues coughing, we see her with her back to the window.
At 8:30, Jack (Alec Baldwin) has the strap of his bag across his chest. In the next shot, it's hanging from one shoulder.
Hazel tells Jenna she saw up her skirt (and "someone won the crotch jackpot!") but Jenna is wearing shorts.
Hazel says she looked up Jenna's skirt at her crotch when Jenna fell off the chair. However, Jenna was not wearing a skirt earlier but the same pair of shorts as in this scene.