Other mistake: During the opening trap we see Mitch strike the blades with his chain and get yanked forward. However, despite being yanked forward he still manages to stand in line with the others which he shouldn't be able to do, as his chain was shorter due to the extra tug he received. (00:06:30)
Suggested correction: The chain is tugged by the saw blade catching it as it is going round, when it gives loose of the chain, the chain is not any shorter than the others, as the saw blade did the tug not the motor pulling the chain in.