I would clumsily throw my wallet so that It would land a ways beside or behind the BG.
Bingo. Best thing to do. Force the thug to MOVE in some way or form from his extremely dominating position of having you point blank range, sighted in with a hair-trigger. If you're lucky, the thug will look down and take his aim off of you for a second to get the wallet. That buys you the time to either run or draw and empty the entire magazine into this scumbag. If the thug is that hell bent on getting the wallet, he will turn and pick it up or back up and pick it up and leave. Even if he doesn't leave, at least you've created more DISTANCE which lowers the chances that you'll get shot in the face. The thug will undoubtedly feel as though they are in a position of total control and power and will most likely not feel endangered by quickly bending over or taking their sights off of you for a second or two. That's just enough time for you to draw, move and shoot. A nice draw, with a lateral movement, and plenty of fire will be the best option.
Just giving the thug the wallet is a bad idea, as you've done nothing to break the thugs position or attention.
Again, if he wanted to shoot you, you'd already be holed. It's apparant he wants your wallet, not your life. Gotta ask yourself what your wallet's worth.
This is pure BS. There have been many cases where the thug gets what he wants, and then decides to execute you anyway.
Just the mere fact that the thug is using a gun is PROOF that he intends to kill you. End of story. The gun is an ultimatum. Give me wallet OR die. That alone should be enough for anyone to understand that the thug is willing to go the distance as far as killing you for a lousy wallet. Why should anyone believe that his ultimatum is BS? That's what the anti-gunners and anti-self defense people would have us all believe. If that's true, then DON'T GIVE UP THE WALLET, since they won't kill you for it, it's just to scare you or leverage you into giving it up. There's no real consequence to resisting is there? LOL.
That animal is willing to end your life for a wallet. That's how much they value life. I dunno about you people, but I'm not going to put my life into the hands and at the mercy of some piece of filth who is essentially telling me that I'll be dead if I don't give up my wallet.
It just amazes me how so many people think about self-defense in this thread. Too many defeatist attitudes. Not enough warrior mindset to DEFEND LIFE.
Look, obviously, in a situation like that, you've been ambushed or caught off guard. You are in a very bad position and at a huge disadvantage. Nevertheless, this doesn't change the fact that your life is on the line. Whether you die because his stupid cocaine induced shaky finger slips, or he executes you for fun, or you die because you fought back - you're going to die. It's your time and times up. God is pulling the plug on you. Might as well FIGHT back and possibly live.
Or you can just pray that the life-threatening thug is benevolent.