When Merrywood first walks into her trailer the door is cracked. We see a crew member shut the door for her.
When Tamara saves the scorpion from the cage, the lock never opens revealing that he was never locked in.
Approx 42 min in the movie when John is in the house of mirrors there are many camera crew and cameras visible in the reflections.
When Tamara walks out of the cage, a stage light is visible.
When merry wood first arrives in the carnival, the mirrors surrounding her show off the camera and the cameraman many times.
21:34 The entire camera reflected in the mirror.
At 8:05 the camera and the camera man are visible moving across the magician.
Boom-mic falls into the shot at 6:12 into the film.