Robert Liston. 1794-1847. Scottish surgeon pioneered amputation prior to anesthetics—amputated leg in record 2.5 minutes! "Fastest knife in the West End". In his fury he sliced off an assistant's fingers, a patient's testicles, etc.
TIL in 1847 Robert Liston amputated a mans leg in under 2.5 minutes operaterating so quickly he amputated the fingers of his assistant as well. Both later died from gangrene and a spectator reportedly dropped dead from fright making it the only known operation with a 300% mortality rate.