Visible crew/equipment: At the beginning, you can see studio lights reflected on Zack's guitar during the song "Schools Out". (00:00:55)
Moving Day - S2-E18
Visible crew/equipment: When Barney falls over in the truck, as he is lying on the floor you can see his mic on the back of his trousers and a wire connected to it. (00:16:35)
Visible crew/equipment: In the scene in Y2K when you see Donny Jones jumping around in front of the TV screens, as the camera slowly moves in past the TVs, you can see the camera man and the camera actually shown on the TV.
Visible crew/equipment: When Nancy gives the story about being aware of her people there's a flashback to when she's at the space exhibit with Stevie. If you look to the right of the screen when she's hugging him, you can see the shadow of the boom operator's microphone being held above their heads on the back curtain behind Stevie and Nancy. (00:27:20)
Visible crew/equipment: During the scene where Dennis and the Waitress, Mac and Dee successively walk into the back office to talk to Charlie near the beginning of the episode, in some of the shots, you can see outside the office door, and you can see the top of the set has no ceiling, and even see part of a stage-light.
Visible crew/equipment: When Florence tosses the note off the fridge when she and Putty enter the apartment, the rod holding the paper is very visible on the far left of the screen.
De landing - S2-E3
Visible crew/equipment: When the Belgians scan the deserted beach, someone walks into the frame from the left. He's there briefly, but visible at the end of the shot (editor should have cut a second earlier).
Everybody Hates Christmas - S1-E11
Visible crew/equipment: Tip of the microphone boom is visible for a split-second when looking at the mom after Drew gets tattled on by his sister.