hey Gitesh! .. really cool stuff!!
.. a few things which in my view would have helped the shot better:
> the actions during the yawn could have been less energetic and a lot slower. It could have helped push the laziness better ... also the way he gets into the stretch could have been slow.. you then would have a nice contrast with all the hurried moves that follow later on.
> also the inclination of the chair where you hold it just before the drop ( 110-120) looks a bit unreal to me... in my view, the chair should already fall with that inclination
> you could have lifted his head up when he is making those hurried moves to show he is trying hard to regain balance... right now, it looks stuck to the edge of the chair.
Its got a nice feel of weight when he falls down ... overall works well!