same thing sorta happened to me years ago with my 1977 gmc truck, it had a manual in it and i rarely used the e brake, so me and 2 friends stop in a parking lot to look at a car for sale, and as we are walking around it, i hear some ruckus across the lot,(it was night time) i look up and see a truck rolling through the lot and hitting the raised curb area around the parking lot light pole, and go " HEY!!! look at this asshole... and my friend goes, thats your truck dummy!!!!

im still amazed how close it came to taking out the light pole, but it skated right by, no damage at all to anything, sept for the crap i had to take from everyone i knew.