Visible crew/equipment: When Zaphod says his first line "I certainly didn't survive.", you can see the person who plays his third arm standing behind him.
Big Brother - S1-E1
Continuity mistake: At the start of the episode when Del walks behind Grandad's chair, the way he is holding his jacket changes between shots. (00:01:15)
The Hand-Painted Thai - S2-E11
Visible crew/equipment: After Bill, Pam, and Ralph go to Erika Van Damm's show, when it cuts to Bill parking the car, we can see the reflection of the boom pole and mic on the car's windshield. (00:27:15)