Did this to myself tonight, only I think closer. I knew what I was messing with from the start, so it was all that much the worse. I unscrewed both bolts to the refrigerant canister, standing away expecting it to blow. But it didn't. So I leaned over it to see what was going on. Then it about blew my face off. 134a is the bright green color of anti-freeze and my eyebrows were that color. Who knows where the bolt it blew out went, glad it wasn't through my brain.
https://www.youtube.com/watch?v=4nF1Pxhiyzc