LOL, yeah something like that.
Air system regulators are usually pretty easy to remove, but the PMI ones happen to be sort of difficult. I use a wooden foot on a bench vice to seize the reg body, and my mighty hands to turn the tank. I like the Crossfire regs better, in part because of teh hex faces that make them easy to remove.
HPS regs have an oring at the top of the threads. I always twist them hand tight, then use whatever tool recommends itself for the regulator in question to turn it just a bit more. The combination of pressure on the threads and torque applied will keep it from turning out, but if you do somehow detach the reg from the bottle, a vent in the regulator on the threaded stem will exhaust the air loudly and quickly, so you won't make your bottle into a missile.
Make sure the tank is completely empty before you remove the reg. It will be easier and quieter, and will prevent you from having to change pants.