docs: function (speed, jump) {
  
  		this.multiway(speed, {
  			RIGHT_ARROW: 0,
  			LEFT_ARROW: 180,
  			D: 0,
  			A: 180,
  			Q: 180
  		});
  
  		if (speed) this._speed = speed;
  		if (arguments.length<2) jump = this._speed * 2;	
  
  		this.bind("EnterFrame", function () {
  			if (this.disableControls) return;
  			if (this._up) {
  				this.y -= jump;
  				this._falling = true;
  			}
  		}).bind("KeyDown", function () {
  			if (this.isDown("UP_ARROW") || this.isDown("W") || this.isDown("Z")) this._up = true;
  		});
  
  		return this;
  	}