Revealing mistake: When Kurt is being chased after in the truck at the end, he pulls out onto the main highway and the truck skids. There are several tire marks where they practised this skid before. Also, at the very end when the truck is being pushed by the semi, look ahead of the front truck tire, more previous tire marks. (01:21:20)





Answer: She was not in on it. However, once she turned against Jeff by encouraging her son, Deke, to shoot him, Jeff suddenly felt her to be as much as a threat as the others involved. This would explain why he had her and Deke into the cellar to be locked up with the others. Also, don't forget she was startled to see the freezer and Amy popping out of it.