Would CTB like this work?

[cyandude]

So here's the idea, there's an exercise rubber band I can attach to the door that could be used to hang myself. I would pressure my head down and relax at a position in which the rubber still offers enough resistance to block the blood flow to my brain. My worry is, would it still work after i passed out or would my body snap back and fall out of the rubber band? I'm pretty sure it wouldn't but still