Audio problem: When Karl is trying to push himself on Jamie, you can hear her screaming when the shot is outside the car, and the screaming continues when the shot's showing both of them, but she isn't screaming.
Audio problem: When Travolta steals the speed boat there is a wide shot of him driving away and you can see Cage running towards him in the top right of the screen. You can hear Cage fire his gun but the muzzle flash doesn't appear until a second later after the gun is fired.
Audio problem: When Castor wakes up from his coma, he reaches up to his face and pulls out the nose plugs that fed him oxygen. Strangely enough, his heart monitor stops beeping when the plug is removed.
Chosen answer: Surgical scar removal is a real thing, usually involving skin grafts or lasers. Keloid scarring is a result of the body aggressively attempting to heal/repair itself after trauma or injury (in this case, the gunshot). With proper surgical techniques, the body isn't traumatized to the point that deep scarring occurs. Of course, just like with the face surgery, the movie exaggerates the results of the scar removal.
Bishop73
I thought he kept it.
He says he wanted to keep it at the beginning of the movie, but when he is about to have his face changed back at the end of the movie, he says he doesn't need it anymore.
jshy7979