William E. "Bill" Haast (born December 1910) is the director of the Miami Serpentarium Laboratories, a facility near Punta Gorda, Florida, which produces snake venom for medical and research use. Haast has been extracting venom from venomous snakes since he was a boy. From 1947 until 1985, he operated the Miami Serpentarium, a tourist attraction south of Miami, Florida, where he extracted venom from snakes in front of paying customers. Haast physically extracts venom from venomous snakes by holding them by the head and forcing them to strike a rubber membrane covering a vial. As a result of handling these snakes, Haast had been bitten 172 times as of mid 2008, more often than any other known living human.