Continuity mistake: When the wife gets hit with the snowball thrown by her kid, she throws her phone. If you look in the background right after that you can see the phone in plain sight laying in the snow between her and the house. A fer scenes later however it has jumped to under the tree.
Factual error: When Snow Plough Man drives his truck around clearing snow, he honks the horn of his truck by pushing the button on the steering wheel. The sound that is made is an air horn. In reality the button on the steering wheel of a truck honks an electric horn like a car. The air horn is actuated by a rope or cable hanging from the ceiling.
Continuity mistake: During the scene when Hal is at the ice-skating rink trying to get Lane to forgive him, he lands on the ice and Lane skates above him and Hal grabs her legs.When the shot is from above her legs are by Hals head and when it is a far shot her legs are by his chest.