Revealing mistake: When Nikita is being taken away after her sentencing, she breaks the top of the wooden bench off. However, you can clearly see it has been cut beforehand to help break off easier. (00:10:30)
Revealing mistake: When Tracy and Kid escape the explosion, the stair and rail wobble, revealing they're a prop.
Revealing mistake: In the shoot out scene at the house when Seagal and Kelly Lebrock duck for cover in the living room you can see Seagal's stunt double as they hit the floor.
Revealing mistake: When the Krays are boxing for the first time, their mum comes in to break them up. She runs up to the ring where a member of the crowd holds the middle rope lower to help her get in the ring. The problem is, he pulls the rope before he sees her making her way to the ring. It can't be a coincidence as he lets go as soon as she's in the ring. (00:26:30)