I came across this video at youtube of audio of Chuck Norris at the 1975 San Diego Comic con. He told the audience what he thought was the reason Bruce Lee died. Apparently, Bruce Lee had ruptured disks in his back weightlifting which almost paralyzed him for life. After a month he was back on his feet but had to take pain killers for the rest of his life. According to Norris, Lee had taken antibiotics with the pain killer and it caused his brain to swell.
I posted this story and everything I could find on the Bruce Lee workout I thought was interesting.