I’ve heard of folks losing grip of the hammer, then having thumb damage after it lights off. Thankfully I wasn’t one of them. The Army hammered that into me.
I learned not even to try it. My dexterity is worse the older I get. Two hands are better than one is my credo. :0)
BTW, I have gotten “bit” by a Glock when I held it wrong and my left hand creeped up above that recoil line. It hurt like beatch.