Continuity mistake: After Charlie tells Irene that he is schizophrenic they hold each other by the hands. When the camera is on him her arms are bent at the elbow, and when the camera is on her her arms are stretched out. (00:41:45)
Continuity mistake: When Hank/Charlie fall into the car near the end his feet are inside the car. When the shot changes his feet are on the outside.
Continuity mistake: This happens a lot in the movie but specifically... When Charlie is shooting the cow, the wide shots with the bike are really sunny, but in the close ups (fingers in the nose) it is overcast or studio lighting. (00:31:25)
Continuity mistake: When Charlie tries to get the little girl off the street there are the same two extras walking by in short succession. (00:17:50)
Continuity mistake: Charlie's neighbor Ed allows his dog to crap on Charlie's lawn. In wide shots he is holding the leash roll in his right, in close-up in his left hand. (00:14:50)
Continuity mistake: At the beginning of the movie Charlie and Layla are sitting on the sea side. After he asks her about her readiness to live on whale blubber in case he gets assigned to the arctic their position changes from resting on their hands to resting on their elbows. (00:03:10)
Continuity mistake: When Charlie is choking the cow the sun changes between shots.
Continuity mistake: While Hank is driving the red mustang and takes Charlie outside, the car the sun changes between shots.
Continuity mistake: At the restaurant when Charlie yells to the kid with the milkshake, the child drops it and makes a puddle besides their table. In a few shots later the amount of milk increases and moves away from the table.
Continuity mistake: When Hank crashes into the barber shop with Dick's car, the angle of the cigarette in the geeser's hand changes from shot to shot. (00:21:20)
Continuity mistake: In the scene where Charlie lets the woman jump the line his newspaper switches back and forth between his right hand and under his left arm. (00:18:55)
Continuity mistake: When Charlie is taking Irene back to New York on his motorcycle they come across a supposed dead cow in the middle of the road, which by the way you could totally tell is fake. Charlie pulls out his gun and shoots the cow a few times then throws his gun off to his right way off the screen. Next screen shot the gun is right next to him. (00:31:20)
Continuity mistake: During the outside motel scene, there is a maroon car parked outside. It changes between a Ford Escort and a Dodge Intrepid. (01:12:50 - 01:20:10)
Continuity mistake: When Irene goes to leave the diner after Hank's jokes, his cigarette switches from his left hand, to his right, to his left again.
Continuity mistake: When we see the policeman with the chicken stuck in his rear end there are more chicken in the background. They disappear a few seconds later. (01:20:10)
Continuity mistake: When Charlie and Irene meet with Gerke, Gerke hides his gun under his arm.He then moves his arm to his side but then in the next shot it's back under his arm.
Continuity mistake: When Hank/Charlie fights himself on the platform the station clock shows 3:50 while Charlie's watch shows 5:55 when he throttles himself. (01:28:05)
Continuity mistake: When the guys in the barber shop return to their game of checkers after admiring the well endowed mom the pieces on the board are arranged differently. (00:16:35)
Continuity mistake: Just notice that in the clip at the very, very end of the movie, when Whitey says he thinks he's found the missing thumb, he ducks under without the hose in his mouth. But in the water, it's in. Then when he comes back out, it's out again!
Continuity mistake: Irene's hair moves back and forth between behind and in front of her right shoulder in the scene where she tells the police officer about her accident. It undergoes further changes when she talks to Dickie on the phone. (00:24:45)
Answer: It's called 'The world ain't slowing down' by Paul Ellis.