reset(fx, fy, life, easing) {
    this.force = this.normalizeForce(new Vector2D(fx, fy));

    life && super.reset(life, easing);
  }
Reset this behaviour's parameters

@method reset
@memberof Proton#Proton.Force
@instance

@param {Number} fx
@param {Number} fy
@param {Number} [life=Infinity] 			this behaviour's life
@param {String} [easing=ease.easeLinear] 	this behaviour's easing