One of the most popular questions I'm asked is, "how did Bruce Lee REALLY die?"

And the short (if not disappointing) answer to this is: As far as I know, Bruce died of an allergic reaction.

I know that's not as sexy as being assassinated by ninjas or whacked by the Chinese mafia...but that's what the evidence points to.

And you want to know something strange?

In a weird way...this was sort of Bruce Lee's last and most powerful fighting lesson to all of us.

I mean, think about it.

The way Bruce Lee -- perhaps the greatest fighter who ever lived -- died proves even people who are seemingly "invincible"...have weaknesses -- an "achilles heal" that can be exploited and used against them.

In fact, some of the best martial arts movies use this theme all the time.

Take the movie "Ninja Scroll" for example. A great anime movie. The hero of the story, a swordsman named Jubei, is attacked by a demon who has solid rock for skin.

He can't be cut or hurt. Except...in his eyes.

His eyes were still vulnerable and so Jubei threw a knife in his eye. The so-called "invincible" demon had a weakness.

My point?

Everyone -- no matter how "invincible" they are -- has weaknesses.

Quite frankly, the human body is rife with "tender" spots that can be exploited by everyone from small children to 80-year-old ladies riddled with arthritis.

Which is why even the strongest guy in the world -- with multiple black belts and years of experience -- can be severely beaten by a 90 lb. weakling who understands just the bare basics of street-fighting.

And while it may sound almost impossible...you can do the same thing.

All you need is the knowledge. And the monkey simple basics of where the "weak spots" on the human body are...and how to get to them in a fight quickly and easily...without needing to be lightning fast or having years of practice in the dojo.