If you ask me, it looks like he was half bending his knee in almost impulse/habit and caught himself midway through.
Also, it was supposed to be custom to kiss the hand of the Keeper of Mecca, even though a few years ago King Abdul said he wanted that practice stopped.
This was another Freudian slip just like the “My muslim faith.. I mean my Christian faith”. And just like in that instance, the media didn’t just not report the flub, but fed him the line to correct himself.
There is a video I saw that looks like he was trying to kiss his ring.
Nah, according to the White House press corps, Obama was cleaning the floor.