In 1814, Meux's Horse Shoe Brewery in London constructed a brewing vat that was 22 feet tall and 60 feet in diameter, with an interior big enough to seat 200 for dinner -- which is exactly how its completion was celebrated. (Why 200? Because a rival had built a vat that seated 100, of course.)
After the dinner, the vat was filled to its 4,000-barrel capacity, ruptured, caused other vats to break, and a wall of 1.3 million gallons of dark beer washed down the street, caving in two buildings and killing nine people by means of "drowning, injury, poisoning by the porter fumes, or drunkenness."
Rescue attempts were blocked and delayed by the thousands who flocked to the area to drink directly off the road. And when survivors were finally brought to the hospital, the other patients became convinced from the smell that the hospital was serving beer to every ward except theirs. A riot broke out, and even more people were left injured.