Continuity mistake: When Ren is dancing at the drive in, he starts dancing with a girl then stops to watch her. When he starts dancing again he moves slightly in front of her in the shot. Then in the next shot they are side by side.
Other mistake: In the scene where they are all running down the stairs of the tower and going into their houses to get their weapons, Moses goes to the lowest floor of them all. Near the end of the film Moses tells Sam to go one floor down to go to his flat which can't be right as he went several floors down to his flat earlier.
Continuity mistake: When Felipe is telling Jill that he loves her, the level of their heads changes every shot.
Continuity mistake: At the airport Tim gets a red Chevy Cobalt for a rental car. It's a base model with no rear spoiler. Later he is seen driving a red Cobalt with a rear spoiler.
Factual error: In the scene where Jack Black is kneeling over Shirley MacLaine's body in the garage, you can see the outline of his smart phone in his pocket.
Continuity mistake: The amount of damage on the guys' car decreases between shots during the race.
Continuity mistake: At the end, Trent texts Malcolm that he's "in library", however when Malcolm looks at the text on his phone, the "in" is missing.
Continuity mistake: A bear escapes from the zoo and Benjamin finds him in the woods. The bear knocks the gun from Benjamin's hands, then faces him and growls. In the close-up, Benjamin's hair is blowing, presumably from the force of the growl, but in the preceding and following long shots, his hair is motionless.
Continuity mistake: In the beginning of the movie when Rachel enters that bar and is welcomed with the surprise party, Darcy comes and puts a colorful necklace around Rachel's neck. In the next shot, Rachel doesn't have the necklace anymore and Darcy is putting it once again around Rachel's neck.
Other mistake: To get revenge against the reds for chopping off his hat, Benny goes inside the house to use the computer to change the woman's lawn mower order. Benny never hits the 'ENTER' key to complete things. Things are completed when he steps on the 'SPACEBAR'. Same thing happens later when Benny is ordering a female flamingo.
Continuity mistake: After sex, Gerry sits next to Grace on the bed and his pink shirt is unbuttoned. Several shots throughout the conversation whilst on the bed and his shirt buttons are now done up, but when he gets up his shirt is now unbuttoned again.
Continuity mistake: When Charley and Ed are arguing in the abandoned house, the light switches on the wall next to Ed change positions repeatedly between shots even though neither of the characters ever touch them.
Other mistake: At the end of the movie, when Sabrina's reading the note from Pam, the note's first two lines say "I'm sorry. I just wanted what was best for my son." The voice over says "I'm sorry. I was wrong."
Factual error: A Great Gray Owl is depicted living in the George Washington National Forest. However, this species is not native to Virginia.
Plot hole: Hobson passes away in the night, and no one notices until Arthur wakes the next morning, finds her unresponsive and cold, then screams for the nurse. Hobson was hooked up to monitors to warn the nurse (and Arthur) of this very thing, and that nurse would have been making regular checks on her during the night; it's what she's being paid to do. There is absolutely no way it could have played out this way, except in a film that needs sudden drama.
Continuity mistake: None of the games in Goon were played in Manitoba, but every rink has Manitoba Liquor Commission advertising on the boards. In the game played in Quebec the advertising on the boards disappears in the zoomed out camera shots and you can see the MTS Centre logo on the scoreboard.
Visible crew/equipment: In the shot where Faris is running to Evans's room to get him away from his one-night stand, as she passes the staircase you can see a shadow with movements that don't coincide with those of Faris. Deductive logic can be used to determine that this shadow is that of a member of the crew.
Continuity mistake: When Alan is taunting Michael about selling door knobs and Michael's back is against the door frame to the dining room, the dining room is dark; both chandeliers are off. All four characters are in the living room but as Michael responds to Alan's taunts, the lights are on, even though no one entered that room and Michael's hands were in his pockets during the exchange.
Factual error: The security guard in the bank is carrying a revolver as a sidearm but has semi-automatic magazine pouches on his duty belt.
Continuity mistake: The designated Pope has just been visited by a physician. Three cardinals want to take a stroll outside for some sweets and arts. One of the cardinals stands and rebukes them; you can see that the cross on his chest has its chain caught in a button of the vest. During the rest of the scene the chain is caught in that button in the closer views and is loose in the wider angles. (00:23:50)