Misbehavior for the Win
If my child undid their seatbelt and started to climb around the car, I would be absolutely livid. With that being said, I don’t allow my kids in the front seat until they’re older- at least ten years old. This mom probably went from anger to fear very quickly!
Also, please don’t seat your minor children in the front passenger seat. Laws exist with weight minimums for a reason. I understand that some vehicles only have one row of seats, and if that’s what you’re working with, make sure the car seat or booster is correctly installed and the airbag is turned off!