Honestly? I'd scream "Run for your lives!" and hit both buttons. But if my choice was constrained, I'd save the 10 people closest to me. And then I'd track the shit who made me choose down and defenestrate his sorry ass. Preferably off the Empire State Building or the top of the Sears Tower in Chicago.
This reminds me of one of those Twilight Zone/Tales of the Darkside stories where there is a couple who are down on their luck and need money badly. A stranger shows up at their door and offers them a choice. Press a button on the device and kill two people they don't know and be paid 1 million dollars, or not press it and stay as they are. He allows them to keep the machine (for up to a month, I think) before making the decision. They discuss it, and agonize over it, and eventually, the wife presses the button.
Very soon afterwards, the man comes back and tells them to enjoy the money, and as he leaves with the machine, he tells them. "Time to find someone else. And I'll make sure they don't know you at all."
This reminds me of one of those Twilight Zone/Tales of the Darkside stories where there is a couple who are down on their luck and need money badly. A stranger shows up at their door and offers them a choice. Press a button on the device and kill two people they don't know and be paid 1 million dollars, or not press it and stay as they are. He allows them to keep the machine (for up to a month, I think) before making the decision. They discuss it, and agonize over it, and eventually, the wife presses the button.
Very soon afterwards, the man comes back and tells them to enjoy the money, and as he leaves with the machine, he tells them. "Time to find someone else. And I'll make sure they don't know you at all."