Or that fighting technique like that called Iron Fist or the Vibrating Fist delivered by a jealousy rivalry during the "Enter the Dragon" caused the subtle injury which slowly killed him.

也有人说是拍摄《龙争虎斗》时，某个嫉妒他的对手用了类似铁拳或振拳的手法对他造成了慢性的伤害，最终使他致死。