Pistonhead is a line of beers from the Brutal Brewing company that features a flaming skull on the label. The Pistonhead Crude Oil is a liqueur that is a fairly high-proof spirit infused with "loads" of licorice and "a bit" of chili. It apparently presents a thick black color... not unlike, we suppose, crude oil. According to the press release, it was first made in brewmaster Leif Borjessen's kitchen. They suggest drinking it is like a "kick in the groin."
Brutal Brewing is a Swedish company that operates on employees' "free time" who normally work at Spendrups breweries. This is a very interesting and enticing project that reminds us a great deal of Google's 20% free time for employees devoted to crazy and innovative projects.