The English translation of the drinking game song is: One crab with eight feet, painted horns - what a big crab./ Blinking eyes, shrinking head,/ crawling, crawling everywhere./ Two and Two, who should drink?/ Three and three, who drink first?/ Five and Five, who should drink?/ Two and two, you drink first.
During the scene where Roy and Chon are drunk in the hotel, director Tom Dey hoped to include a drunken kung fu scene, as an homage to The Legend of Drunken Master (1994). There was no time to choreograph such a scene, so Dey showed Chon blowing bubbles from his mouth, as Wong Fei-hung does in The Legend of Drunken Master (1994).
Chon Wang is the Chinese translation/pronunciation of John Wayne. However, in the case of Jackie Chan's character, Chon represents his last name while Wang is his first name. This represents the order Chinese names are presented.
The song playing during the first bar-fight sequence ("La Grange" by ZZ Top) is the same song that plays during the The Dirty Dozen (1967)-style intro of the characters in Armageddon (1998), an earlier Owen Wilson film.
According to the commentary: the fight scene with the horseshoe was nearly impossible to do with a fake horseshoe as it was too light. Jackie Chan, however, refused to strike any of the stuntmen with a real horseshoe, saying it was too dangerous.
The traveling show (seen at the end behind Roy O'Bannon's former gang) has a reference to the western television series Dr. Quinn, Medicine Woman (1993), and also a reference to Sapper's Bulldog Drummond character.