In 2010, a guy in San Francisco named Matthew Riese started raising money on, to build the coolest hovercraft EVER.  It cost $5,600, and it's an exact replica of the DeLorean from'Back to the Future'.

Riese debuted it at the Giants-Rockies game on Friday night.  He drove it around in McCovey Cove, which is just on the other side of the right field wall.

According to Riese, it can go about 45 miles per hour.  Not 88, sadly.