Revealing mistake: When Richie shoots the random woman, as soon as he grabs her head and shoots her, it is clear that it's a dummy.
Revealing mistake: When Gino puts a cleaver through the hand of one of Richie's men during the fight at the butcher's shop, you can see the man is wearing a fake hand.
Revealing mistake: When Gino hits Richie with the roller, the padding on Richie's back can be seen underneath his shirt.
Revealing mistake: Before the showdown with Richie, Gino grabs Tattoo's arm, pulls him through the railing and he slams face-first into a brick wall. When Tattoo hits the brick wall, it moves.
Revealing mistake: It is quite clear that the bad guy shot at the end by Gino has a fake leg below the knee. It even comes away at an angle even though he was shot from the front.
Revealing mistake: In the final showdown with Ritchie you can see there's 2 stunt doubles for William Forsythe in different shots of the fight - the stunt man is a skinny frame guy then a puffy fat guy fat in another take.