Okay, when you understand the circulatory system, you understand how blood flows. Okay, what I'm going to do is I'm going to grab blood—well, I'm not going to really do it—but I would grab blood, maybe, and what I'm going to do is

once I grab that blood, the body reacts. Do you know what happens when you get cut? You bleed. Why do you bleed? 'Cause there's a wound? No, 'cause what your body's doing is it's trying to send blood through there so that it can clot

and it can stop. Now, why, when you get severed on a vein, do you bleed out? Does anyone know? You should know this stuff. You know why you bleed out? An open—it's an open artery. Heart pressure through your ve—very, very good. Your heart creates

pressure through the veins and through the arteries, so it's going to—weak—absolutely true. Here's the part that kills you, though: your brain. Your brain is what kills you. Black. Right? Let's say I get severed here, right? What your brain says is, 'Hey, there's no blood going in my

hand; it's going numb. Let's pump faster; let's get some blood there.' Your brain doesn't know—not—not—not that part of your brain—it doesn't know that uh there's a severed artery. It says, 'Here's the quickest one.' It severs here, right? And

your brain's like, 'I don't have any—I don't have any oxygen! Pump faster! Pump faster!' Do any—anyone seen an old Japanese movie? Looks like a blood fountain. They really do well with that. And that's really what happens. You don't bleed a little bit; it's not like

In gangster movies, when someone gets cut, the guy goes, "Oh gosh, oh no!" You don't have time to say, "Oh gosh," you're a fountain, spraying all over the place. The reason is that anytime there's a blockage,

anytime there's a stoppage, your brain says, "Hey, I need oxygen!" It starts pumping faster, pumping harder. Does that make sense? Okay, so what I do is I create that blockage. Now what's the brain going to do? It's going to say, "My arm is

numb." It's going to start pumping blood, push it there, push it to the arm. And then I stop somewhere else, and it's overwhelming to the system; blackout. It's very similar to getting choked out, actually. Not choked out... Choked out has to do with getting choked out of

losing oxygen. It's... it's very close to being strangled, being uh... having your blood cut off. Some people choke, some people strangle. We strangle, choke, and some other... cover all bases. Any... any... any questions?

Why your brain kills you.

sogobujutsu

Blood flow and the body's reaction to injury

Understanding blood flow in the circulatory system.

The body's clotting mechanism in response to wounds.

Why severing a vein causes less bleeding than severing an artery; the role of heart pressure.

The brain's reaction to a lack of blood flow to a limb, such as the hand.

The brain's unawareness of the severed artery and its response of increasing heart rate.

The resulting rapid and profuse bleeding.

Creating a blockage and the brain's response

The speaker's method of creating a blockage to illustrate the brain's reaction.

The brain's response to the blockage: increased blood pumping, leading to overwhelming the system and a blackout.