trick shot but DW

it's a game we're each people have to stand on a platform and wait as the game starts...the rule is simple,just press a button,but you have a choice if you want to press it or not,and you can only press it once.after 4 seconds the machine will turn by the amount people pressed a button on their platform.and the one at the bottom middle will fall down, as well as the person standing on it.no reason were they go,no reaction from people,and all there's left after the first elimination,mercy...HAVE FUN! :3