Thanks Zach, now it works well.
After reading a few old forum`s discussions about changing easing for reverse(),
I wrote this code:
onClick: function () {
chair.reversed() ? chair.play() : chair.tweenTo(0, {onComplete: chair.reversed(true),ease:Bounce.easeOut});
Is this code ok? Or after GSAP3 release, it can be implemented more easily?