GWAR, as you may know, is a satirical metal band. They're known for elaborate costumes and extreme stage shows.
According to www.americancraftbeer.com, Impaled Ale is the second GWAR-themed beer. Three years ago, a couple of home brewers in the Tampa Bay area created Death Piggy Ale as an homage to the band.
Almost all the Impaled Ale will be canned and kegged to be sold at GWAR-B-Q, so if you really want to try it you may have to travel to Richmond.