Continuity mistake: Rambo wakes Tuba up spilling the cup's content on his face, but the liquid almost completely vanished when it cuts back to Sammo Hung's face. (00:56:00)
Continuity mistake: When Joanne's father sits down with Tuba, in the closer shots his tie creases very in the middle, but wasn't that way in the wide angle. (01:04:35)
Continuity mistake: During the dinner shenanigans, the mischievous ghost grabs Tuba's hand and forces him to do bad things with the cake. In the close-up when he picks the cake up though, there are not just Tuba and Rambo's hand, but a third hand too. (01:09:15)
Other mistake: Tuba is back home after Rambo completely ruined the dinner at his fiancée's. During the scene, the clock on the wall has all hands still, including the seconds. (01:11:00)
Visible crew/equipment: When the businessman parks the car to bring the blackmail money, several bystanders crowd the sidewalk and stare at the camera crew. (01:13:00)
Continuity mistake: The combative henchman who had the shootout with Cheung throws the suitcase on the speedboat and then throws himself on it; in the first shot he jumps facing the ship and holding to it with his left arm, in the reverse shot he's facing the other way and using his right arm. (01:18:00)
Continuity mistake: At the food market, the henchman brings the suitcase to his accomplice, who touches the suitcase towards the corner. In the reverse shot, his hand is in a different position more towards the center. (01:18:55)
Continuity mistake: When the gang member puts the citrus on top of the money, the box he uses as a lid has an orange band on it, and it's on the left half. When the boss grabs the box, the orange line is on the other half. When he bumps into Tuba, he's carrying a different box without the orange band. (01:19:25)
Continuity mistake: A fight ensues inside the market; Tuba watches the two baddies ganging up on Cheung and kicking him through a stack of baskets and some boxes of fruits. Cheung in the first shot is crashing on a box of apples which becomes a box of oranges in the next one. It does not add up. (01:20:20)
Continuity mistake: When Tuba musters some courage and rushes to help Cheung, he tackles the villain in two completely different trajectories in the two shots. (01:20:25)
Continuity mistake: Jeong-lee Hwang is fighting Tuba in front of a metal cage. He sends him against several boxes of fruit, and you can see Sammo Hung reeling against a brown box of apples. Out of nowhere, in the next shot a box of oranges appeared on top of it. (01:20:40)
Continuity mistake: During 'part 2' of his fight, Cheung gets grabbed by his opponent by the jacket; he holds him in a different spot between shots. (01:22:40)
Continuity mistake: In the battle against the opponent armed with a hook, Cheung tries to jump on him when he's on the ground, but the guy sends him back with both feet into a bunch of fruit boxes. Cheung knocks most of them down, but in the POV shot of the villain when he looks for him, a few boxes are back where they were. (01:23:15)
Continuity mistake: When Tuba 'possessed' by Rambo sprints towards the bad guy for the final clash, the items on the desk in the room with the money change placement between shots (look at the green jar, for instance, or when Tuba gets knocked down again and jumps over the desk, which at that point has on it just a book that turns and shifts in the reverse shot). (01:24:00 - 01:25:10)
Continuity mistake: Joanne's dad hits Tuba up with the baseball bat after he tried to fix his zipper; between shots Sammo Hung's hand is in a different position, as you can tell by the writing on the bat that suddenly in the second shot is in view and not covered by the hand anymore, and even further uncovered in the next. (01:29:15)
Other mistake: When Tuba argues with Rambo in his room and Cheung can't see him, the calendar on the wall is a June 1986 calendar. While it's not specified how long Joanne and Tuba have been dating and it is hinted by the different clothes in each vignette that they certainly have been going out a while, the events of the movie don't take a whole year (the blackmail that caused Rambo's death is attempted again in a later scene, and Rambo wouldn't just let Tuba alone without visiting him for months). Later in the warehouse fight the calendar shows January 1986.
Factual error: Tuba pranks the store manager while he is reading adult magazines. One of them though (the one he is holding) is the August 1985 issue with Angela Nicholas on the cover. The previous scene took place at the Hong Kong Marathon of 1985, in January.
