Yes, it's real (and discussed on the Miata list). A lady parked her Miata and forgot to put on the parking brake (parked in neutral). The car started rolling downhill (with her chasing it). Picked up speed, went through a fence off the embankment, air borne, and into the neighbor's pool (the neighbor was in Florida on vacation at the time). Took a crane/tow truck to lift it out. The other post on LotusTalk has photos of the lifting.