Revealing mistake: When Martin is amazed about the osprey, Chris' hand clips through Martin's sleeve in front of it.
Revealing mistake: When Mr. Goodman blows his nose, you can see a little pink from the makeup on his nose (to make him look sick).
Revealing mistake: There are numerous episodes where Mike is recording a video for Outdoor Man with his webcam, and a status bar is advancing towards the end of the video, indicating that the live recordings were added to the video stream in post production and synced up to the original performance.
Hungry Like the Wolf Dog - S3-E18
Revealing mistake: When Jillian throws the keg, you can see a rope attached to the keg pulling it after she spins.