Grandma's Boy (2006)

Plot hole: Early on in the movie after Alex met Samantha while he was sleeping, the next scene he's drawing a full picture of concept art for his game Demonic, which could have been proof that he made the game. (00:12:30)

Plot hole: Contrary to the realism of developing a video game Alex should have had external files such as character models, stage maps and coding on his laptop which he could have used as evidence that JP stole his game, It would be impossible to keep all of the games files on one disc especially if he wanted to change something in the game because if you want to modify a DVD-RW you have to erase the disc data and reburn it.