// Client side
socket.emit('shot fired', {x: m.shot.x, y:m.shot.y, move:m.shot.move, prevUpdate:m.shot.prevUpdate});
// Server side
function onShotFired(data) {
    var shootingPlayer = playerById(this.id);
    if (!shootingPlayer) {
        util.log('Player not found: '+this.id);
        return;
    };
    this.broadcast.emit('shot fired', data);
};