I witnessed a car accident between two parked cars...

My mom and I were visiting my grandparents in Lake of the Ozarks. While there, we made a stop at Walmart. We got our stuff, went back to our car, and Mom started backing out, and didn't see this car that was pulling out behind us. "Mom! Watch out for that car!" So, she stopped and we started laughing and cracking jokes about it (side note: my family jokes and teases about everything, so if you ever come and visit, consider yourself warned). We started making our way outta the parking lot, and this Mazda Miata was cutting it way across the lot. Teasing my mom further, I told her to watch out for that car, too. We started laughing again, and tried to take a peek at the driver who was not really watching where he was going. Much to our surprise, there wasn't a driver in the car! "What the?! Stop the car!" I hopped outta our car and took off running after the member-less Miata. At first it was rolling slowly, so I was going to try to jump in it and put on the brakes before it hit anything, but it picked up a lot of speed and my better judgment (a.k.a. "Mom") told me I better not try. That poor little thing smashed into the side of this huge pick-up truck with a boat hitched to it. It was horribly hilarious to watch. I went in and told the Walmart people, so they can alert the drivers. The Walmart workers laughed so hard that they almost peed in their pants. I'm guessing that the owner of the Miata was a girl (I'm envisioning someone Paris Hilton-ish) cuz there were bags from girl stores in the back... and she didn't know to put the emergency brake on when parking a stick shift. I forgot to leave my info for witnessing the accident, and asked my mom if I should go back. "Why?" she asked. "What are you going to say... 'I witnessed the accident between the two parked cars'?"