Knight in White Satin Armor - S2-E12
Revealing mistake: While Christopher and Furio are dismembering Richie Aprile on a meat saw, you can see that the blade of the saw is still, but the blood is splattering all over the place, and you can hear the sound of the meat saw cutting through flesh. (00:49:55)
Knight in White Satin Armor - S2-E12
Revealing mistake: Noticeable blood pack under Richie's shirt when he's shot by Janice.
Knight in White Satin Armor - S2-E12
Revealing mistake: Richie is breathing on the floor, despite having been shot to death. (00:46:58)