Continuity mistake: When the they first show the Evil Snow-Plough Man, he's chasing kids and they run off to the left side of the road as proven when the kid's sled gets crushed. However, once he's past, they all pop up from a mound of snow on the right side of the road.
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.
Continuity mistake: When the mom comes home late for dinner near the beginning of the film she sits down but then her phone rings and Chevy Chase is seen with his wallet already out in his hands. However, in the next shot of Chevy Chase, he takes his wallet out from his coat again.
Continuity mistake: During the scene where Chevy Chase is interviewing the kid at the ice sculpture festival, the position of Chevy Chase and the kid in relation to the ice sculpture change constantly and very noticeably throughout the whole scene until the ice sculpture falls.
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.