Aerodynamics of Gender - S2-E7
Trivia: When Abed is in his "Terminator" mode, the display shows references to later episodes (and at the time unaired). On the left is "Projected Cycles." In s02e08 we learn Abed inadvertently began tracking the girls' menstrual cycle. Under "Memos" there's "Record Cougartown. Troy's Birthday 14 days. Get Rudolph for Xmas. Confirm Mom for Xmas. Build blanket fort." Later we learn Abed loves the show, and in s02e19 he tells Jeff he was an extra on the show Cougartown (Abed/Danny Pudi does actually appear as an extra in the show). In s02e10, the group celebrates Troy's birthday (while still respecting his Jehovah's Witnesses believes). In s02e11, we learn Abed's Mom comes to visit every December 9th and they watch Rudolph the Red-Nosed Reindeer. In s02e09, Abed and Troy build a blanket fort. Additionally, s03e14 is the episode with multiple massive blanket and pillow forts.
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.