Body inflation

Not if it's done right, no, but it's true that if one doesn't do it right they can badly injure themselves. I assume the trick to it is being very precise and careful.

The majority of those who do it are still fine from what I've seen so... well, people should be careful how much they push their limits.

It's not dangerous, as long as you know what you're doing the. You should be fine. I've been inflation for a few months now