What could go wrong? Well, pretty much anything that could, go wrong, did go wrong. First, as Royal has explained, taking a tank off and moving it from one area to another is a pretty safe thing to do, if you keep the second stage [that is the part that goes in the mouth] firmly gripped in your teeth. These days, I have a strap that goes through the exhaust ports and around my neck. This way, if I drop the mouthpiece, it is still close by to me.
However, that day, I tossed the tank through the opening, and everything just followed with it; tank, regulator, mouthpiece
However, that day, I tossed the tank through the opening, and everything just followed with it; tank, regulator, mouthpiece