This is an hilarious one, if a player asked me to put my hand up in the air in the middle of a hand, i certainly know what id say in return, and it wouldnt be a very nice reply.
As for tell with shaking hands, its usually the sign of a VERY powerful hand, and usually the player is not bluffing. However more experienced players will use this knowledge to their advantage. As with all tells
you need more to go on than just a minor tell like this, you need to combine how they played previous hands with information like the betting pattern of the hand, then you tell becomes much more useful.