Continuity mistake: When the pirates swears the oath to kill Dragon Mao, they drip blood on one of the pirate's hand. The blood stains on his hand differ between the shots. (00:02:50)
Continuity mistake: Once Jack has successfully approached Karen, he fakes to go away, only for her to ask him to wait. The street behind him is in full daylight, while it was mostly in the shadow when they crossed it a moment before. (00:04:00)
Continuity mistake: After the snake comes out of the toilet, foam disappears from the toilet seat and toilet paper appears on the tank.