Riot (2015)

Continuity mistake: When he fights Chuck Lidell, he is wounded on the right side of his body. During a scene when he is lying on his side, the wound has moved to his left side and then magically reappears back on his right when he stands up.

Continuity mistake: In the first scene of prison violence, babyfaced bully Semyon grabs a guy's head and smashes it on the table. In the close-up we see the foot tray bouncing off, pieces of lettuce fly and a clanging noise is heard. And yet, after the cut nothing happened, the tray is still in front of the poor victim, not a piece of bread out of place, nothing spilled on the table. (00:15:30)

Sammo

Factual error: The good guys manage to take over key parts of the prison by homebrewing some chloroform mixing alcohol and bleach in a cute little spray bottle, crawl through the ventilation system and slip in the room a couple dainty squirts. Which instantly knock the guards (one of them with a full face helmet) out. All of this is of course bahooey; chloroform is really volatile and would never make it across the room, and the dosage is absolutely negligible. If the gas were this powerful (which is not) would have KO'd the two agents anyway while they were doing this chemist stunt preparing the gas itself in the tiny broom closet.

Sammo