I think the explanation is spot on. Try it yourself and imagine you are 1 foot taller than the other person. You put one hand out and then reach down with the left hand for a double-handed handshake. Your torso is going to go down exactly like that. Try it. Seriously. Personally, I think the double-handed handshake itself is kinda douchebaggery and it resulted in a strange looking photo, but I don't think he was trying to bow.
I know everyone will say I'm just trying to defend, but seriously, try that move, that's exactly what will happen.
I know everyone will say I'm just trying to defend, but seriously, try that move, that's exactly what will happen.