Revealing mistake: "Death" sets up Hunt's demise by activating the pool's purge pump and running it at maximum (so powerful it can suck the internal organs out of a person). The purge pump runs for several minutes before Hunt drops his coin into the water and goes after it. Despite the purge pump running at maximum all that time there is no change whatsoever in the pool's water level.BocaDavie
Revealing mistake: When George and Nick are walking across the street from the hospital where the "guy in the cowboy hat" is recovering, you can see that there was a green screen being used. As they are walking across the street, they seem to be a different shade than the background and a couple seconds later, George is hit by the ambulance.fiveonfridays
Visible crew/equipment: In the hair salon if you look into the mirror on the left as the camera moves, you can see the camera in shot.
Revealing mistake: In the first shot of the custom car shop, a nozzle can briefly be seen spraying showers of sparks (supposedly from welding).