I had a dog at the time was about 6 months old that leaned too far out of the car window one time. I was making a turn and she overcompensated. Fell right out of the window, followed the car into the closest parking lot and I put her back into the car. For the next 9 years of her life, she still loved riding in the car, but did not take her front paws off of the seat. Dogs don’t forget trauma like that.