Factual error: Chow is carrying around $21 million in gold bullion. A bar weighs 400 ounces. Gold prices at that time were around $1,200 per ounce, and he's got two bags, therefore he's supposedly carrying 8,750 troy ounces, or about 600lb/270kg, on each arm. (00:46:20)
Continuity mistake: After his karaoke Chow puts his knife on the right side of Stu's neck, but for the rest of the movie we see the wound on the left side of it. (00:34:05 - 00:38:25)
Alan: We can't be friends anymore. When we get together, bad things happen and people get hurt.
Mr. Chow: Yeah, but that's the point! It's funny!
Question: Isn't the plot inherently flawed? Chow was already in Las Vegas, so there's no real correlation between him and the main characters, so he would've stolen Marshall's gold, whether or not he met them right?