Audio problem: We hear Troy say "you thought" while he is talking to Annie, but his mouth doesn't move. (00:01:15)
Audio problem: A chef is being shot repeatedly by paintballs and heard screaming as he falls. However, his mouth never fully opens for him to scream as intensely as he was. (00:17:30)
Queer Studies & Advanced Waxing - S6-E4
Audio problem: Elroy walks into the study room complaining about Donkey Kong stealing his idea. We hear him say they made "the eggs into barrels" but his mouth makes completely different movements. (00:00:55)
Audio problem: Troy asks if he can be a surprise witness, and then says "Wait." We hear him say this, but don't see him open his mouth to say it. (00:19:10)
Audio problem: Before Abed returns to the dance, he says to Rachel "Okay, bye, " and even though it is in a profile, his mouth movements don't match the words as it looks like he says more than that. (00:14:55)
Economics of Marine Biology - S4-E7
Audio problem: After Abed's fraternity runs loose, making Archie spill soda on his shoes, he expresses his dismay loudly, with commotion of the frat still being heard. Suddenly there is a very noticeable and abrupt audio cut right when Annie says her next line. (00:10:45)
Economics of Marine Biology - S4-E7
Audio problem: Coach Chapman makes his way up to the white board to introduce himself and the class topic. We hear him say "Welcome to P.E.E." but his mouth doesn't open at all.
Audio problem: Jeff summons Abed and Troy to meet together, saying "this has to stop," to which Abed replies "tell him." But the audio was cut abruptly at the start of his sentence and we can only hear "ell him."
Answer: His attempt to "kill" Jeff was to roll at him as an iPad on a stick. He knew it wouldn't work, but it played to the story that he was a killer as he knew Jeff would tell people about it, or attempt to retaliate for it.