The Mechanic (2011)

Revealing mistake: While Bishop and Steve McKenna are practicing with various firearms, a slow-motion shot in the film of Steve shooting a .50 caliber rifle shows that, while the sequence depicts him firing "live" rounds, the extracted shell casing is from a "Blank" cartridge (evidenced by the crimped forward portion of the brass casing). (00:34:15)

Factual error: When Bishop and McKenna are discussing how to kill the preacher, Bishop states that epinephrine and adrenalin are a lethal combination; they are actually two different names for the same thing.

Visible crew/equipment: In the scene where Bishop gives Steve the first aid kit after Steve's first kill you can see a boom mic in the upper part of the screen. (00:48:25)

Trivia: Director Simon West makes a cameo as Dean's henchman who gets killed by the garbage truck driven by Arthur.

Arthur Bishop: Good judgment comes from experience, experience comes from bad judgment.

Dean: I'm going to put a price on your head so big that when you look in the mirror your reflection's gonna want to shoot you in the face.