While Nancy is driving to the garage to crash the car, skid marks are visible on the driveway from previous takes.
When Nancy crashes the car in the garage the second time, her face clearly impacts the steering wheel and then a sloppy edit confirms that they had to stop filming to take care of the actress.
At about 1:11 after they have driven the kids off the road, Jackie says "I'll drive" and he reverses the car, tyres screeching on asphalt can be heard and they are driving on sand.