, I only, explosively, force a lot of air out of my lungs. Directly after that I get an excruciating
pain all over my upper body; chest, back,
neck, sides and back of my head, arms, and hands. Like there is a few hundred Volts running through me. I've passed out a couple of times because of it. It takes about two hours before the pain's completely gone. What's happening, is it dangerous, can it be prevented?