Two memorable exeriences with MAST.
1st, shortly after they first became available, a young Roughneck of the oil rigs got too close to one and it lopped off his leg. He was pretty much bled out, but we applied the MAST(rousers) and by the time we got him to the hospital, we had a pressure. The attending Orthopod took one look at the trousers, said "What the hell is this?" and then proceeded to rip the velcro seams open so he could see the injury. Naturally, that was the end of the kid.
2nd was a young Gang-Banger got knifed in the back. He was bleeding out from a nicked pulmonary vein. We got to him, applied the MAST which appeared to help just enough to get him into surgery and, after a week in a coma, he came to and walked out of the ICU (AMA of course).