Revealing mistake: On the ledge Robert Hayes is attached to the wall by a wire protruding from his shirt.
Suggested correction: Not true, the ledge was only 2 feet off the ground.
Factual error: When Cressner falls and lands on the horn, it makes the same pronounced honk sound as when he had honked it at Norris. In reality this wouldn't be possible because the bell of the horn was compressed on landing when Cressner threw it out the window earlier, so the sound would've been higher pitched, if it was still able to make a noise at all.