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When Evan is a frat boy and sees his jacket on the ground, before Tommy shows up, the arms are folded exactly the way his arms are blown up later. See more...
The Butterfly Effect (2004) - 8 major mistakes
starring Amy Smart, Ashton Kutcher, Ethan Suplee (add more)
Plot hole: When Evan is in jail with the religious prisoner trying to get him to help him get his journals back he goes to the scene where he is drawing that homicidal picture in kindergarten, but he gets up and puts the spikes that holds documents through his hands, creating a stigmata-style scar. The religious guy in the cell with him is so amazed because of this he thinks Evan is a prophet and he decides to help him. If Evan had gone back in time and got those scars on his hands, he would have changed the original timeline and would have arrived in jail with those scars the whole time. Some people try to correct this using the "If I can create scars, then can I fix them?" statement Evan made to defend the mistake and suggest he can create instant scars but he was using the word "scars" to refer to the negative events; not literal scars on his body. The scar he got when he burned himself in the past didn’t magically appear on him the moment he returned from the past; it became part of a new, slightly altered timeline (just like the scars on his hands should have been) and it let him know he can change history.
Continuity: After little Kayleigh picks up the blockbuster, older Evan is now at Sunnyvale Institution. The blankets are not tucked under the mattress, then they are tucked when he gets out of bed, and in the shot from under the bed, as he searches for his journals, the blankets hang down to the floor, yet in the next shot they are not.






