About 20 minutes ago, I was dropping my sister off at her apartment. I was driving my mothers car. I pulled up to her apartment and put the car in park- the LED that shows it was in park was clearly lit up. I had my foot on the brake while talking to her through the passenger side door, and out of no where, after my foot leaves the break pedal (while the car is in park) the **** thing revs and reverses like a thing possessed. This caused her to take a tumble, and the car only stopped when I applied the brake again. Minutes after this happened, I looked at the dashboard LED display and it was still showing it was in park. Thankfully, she was okay, save for a sore bottom. Now just what the heck happened? Was the LED display wrong? Was the car some how in park but still in reverse? The gear that switches into park and what not has been a bit rough on my mother's car. Sometimes it takes a lot of force to get it properly in and out of park, and into drive. Could that have caused this to happen? Why would it rev like that if I didn't depress the gas pedal? The car is an automatic, BTW. I'm extremely OCD when it comes to driving and can say with 100% certainty that the LED screen was indicating that the vehicle was indeed in park.