The original (fictional) drink was invented by Zaphod Beeblebrox, a major character in Douglas Adams' novel The Hitchhiker's Guide to the Galaxy. The effect of a Pan Galactic Gargle Blaster is like having your brains smashed out by a slice of lemon, wrapped 'round a large gold brick. It has also been described in the novel as the alcoholic equivalent to a mugging; expensive and bad for the head. This is a more practical, but no less potent, version that is all about the booze. You definitely need to pace yourself... and your liver!