3/4 second to fall and make noise. Possibly his collapse is silent, and he's out of sight of the others. In 3/4 second, from a braced firing position, get a subsonic, silenced 22 into at least one more man at 100m, at least 2 more at 50m, at least 3 more at 25m. Then hit 1-3 more before they figure out where cover is, and managed to get to it. "only" a .22 thru your arm, neck, shoulder, leg, gut, etc, you'll still be dead in an hour or a week. Doesn't matter, whether your friends kill you and take your stuff, or you will flop around for a while, then bleed out, get infected, die of that, you are no longer a threat to anybody that you couldn't even detect-hit when you were UNWOUNDED.