Visible crew/equipment: When they are breaking out of the jail cell, when he opens the door, there is a person that holds the door open.
Visible crew/equipment: During Chon Wang's battle at the bell tower, he is hanging onto a board in one shot, and you can see a large net under him, in case Jackie Chan (who played Chon) fell.
Answer: During the Qing Dynasty it was compulsory for men to wear a queue to prove loyalty to the Manchu rule. Refusal to follow can result to execution considering that as treason. Also, he not only prevented him from going back to China but also preventing him from informing the Emperor of his crimes without his queue.
Yes, but in fact, Jackie Chan wasn't wearing a queue in the movie. He only had the pony tail. His head should have been shaved half bald, especially if he was the Emperor's Guard. They just didn't want to show Jackie Chan in a half-bald hairstyle.
Similarly happened in 1976 film Hand of Death in which Jackie co-starred in. That film too was set in the Qing Dynasty but all men still had their queues but no shaved temples. The slaves in Shanghai Noon however some of them did actually have that hairstyle correctly having both queue and front temples shaved bald.