As the description on the bottle indicates, "riggwelter" is when a sheep gets stuck upside-down and can't get up. At 5.7% this beer isn't exactly going to put you on your back, but it's a large bottle, so who knows. The beer is described as Yorkshire, which is an indication of the fermentation system used. (Samuel Smith is another brewer who uses the Yorkshire Square system for some of their brews.) Essentially, the system works on a two deck principle. The lower deck is where wort and yeast are initially placed. The krausening yeast moves to the upper deck and is captured. The beer from the lower deck is pumped and runs through the upper deck, collecting the yeast, and then runs to the lower deck. The process is stopped at some point, allowing most of the yeast to sit on the upper deck. It's a unique, expensive, rarely used and terrific process. It lends a ton of character to the beer. Of course, these guys use a stainless and round square system (I know, it doesn't make sense), which they developed. However, I believe Sam Smith still uses stone vessels, which adds its own unique quality. Let's see if ...