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.
The Gang Goes to the Jersey Shore - S7-E2
Visible crew/equipment: When Dee and Dennis are walking across the beach, the shadow of the camera can be seen on Dee's stomach. (00:03:55)
Visible crew/equipment: The boom mic is reflected in Dee's car door jam when Dee and Frank are talking.
Visible crew/equipment: When Frank is running back to Dee's car after speaking with Barbara and Ari, the boom mic can be seen entering the shot towards the bottom right corner of the frame. (00:12:45)
Visible crew/equipment: When Dennis walks away from the waitress, you can see the edge of one of the cameras on the left side of the screen. (00:16:45)
The Gang Gets Invincible - S3-E2
Visible crew/equipment: When Frank is in the bathroom, we can see a part of the cameraman shirt. (00:14:30)
The Gang Exploits the Mortgage Crisis - S5-E1
Visible crew/equipment: When the gang realizes the family is still residing in the home Frank has just purchased a verbal quarrel ensues, obviously. In one of the shots you can see a good bit of a crew member on the left side of the screen. (00:05:40)