It’s coming up to 50 years since the world was rocked by the mysterious death of one of the most influential martial artist of all time — Bruce Lee, who died aged 32 in Hong Kong on 20 July 1973.

Lee’s official cause of death is listed as cerebral oedema caused by hypersensitivity to Equagesic, an aspirin/meprobamate combination drug, with no signs of external injuries or tongue bite at autopsy.