7. Bruce Lees death is definitely one of the most mysterious celebrity deaths. In 1973, one of the most famous martial arts actors this world has ever seen took a painkiller for a headache and he laid down to take a nap. Bruce never woke up. According to the doctors, his death was a death by misadventure, cause by his reaction to the medicine. Of course, many people still dont believe in this story, and there are even rumors about the curse in the Lee family; Brandon Lee, Bruces son, died in 1993 while he was filming a scene for the movie The Crow.