Looks like Obozo wishes he were in bow position.
The Left Handed Shake: Those that give a left-handed handshake are seen as at the very least a little strange and at the most as down-right insulting. To some people its as bad as spitting in their face. Want to know why? In some cultures, you wipe your backside with your left hand. In many western cultures this is seen as a sign of complete disrespect to the other person so why would you do it in the first place.
http://gilpizano.com/personal-development/diversity/lot-persons-handshake/
FWIW
(Exceptions, of course, such as for the disabled (R. Dole) and Boy Scouts. Neither of which apply.)
hand on top = dominant player
Putin knows the art of body language. Having the hand on top indicates that he has the “upper hand” in the situation.