You don't necessarily have to be "senior" to have those moments - despite their pleas, a friend of mine once dropped her boys off to school on Labour Day. It was only as she was driving out of the "drop zone" she realised there were no other parents dropping kids, and that the carpark was completely empty. She soon reversed back and let the boys back in the car. They constantly remind her of it to this day.
It's all fun and games until someone gets hurt - then it's bloody hilarious!