Factual error: In the scene when they are locked in the garage, they attempt to use vehicle air bags to propel themselves through a garage vent in the roof. It is absolutely impossible for a air bag to deploy by jumping on it. A air bag requires specific battery voltage and resistance supplied by a air bag control module to deploy a air bag. The physical act of jumping on it will not deploy it.
Continuity mistake: At the beginning of the movie when the main character and his friend are sitting in the break room having a conversation about getting old and their friends dying, the straws in the drink cups on the table and the paper sleeves on the straws appear halfway through the conversation.