100% support
You can do the onPlayerLeave using default events:0 onPlayerTouch > cancelEvents0 onPlayerTouch > setColor > red400 onPlayerTouch > setColor > whiteThat'll make a brick red while you're on it, and white when you're not.You could try doing some sort of print counter and when it overflows, it collapses the bridge. Maybe increase by 1 ontouch, and decrease 200ms after. Then you can adjust how high the counter goes to make sure there are X many people on it.
http://forum.blockland.us/index.php?topic=81801.msg1432714#msg1432714