In the bar scene, the towel on Michael's shoulder randomly goes on and off as the camera angle changes.
At around 3 mins, when Ted Danson returns from earth after saving his friends' lives, in the entire scene where he hands the key with the frog chain to the Mike O'Malley and then leaves, the key is obviously already standing on the desk.
One of the listings on the "LGBTIQ Movie Night" flyer posted to an outdoor campus bulletin board reads, "Mad Max 2 (w/Tina Turner!)". Tina Turner was in the third Mad Max movie, not the second.