Though I have no proof of this I am convinced that a coaching philosophy that international coaches teach their players is that if you are beaten on a play and it looks as if you are going to give up 2 or 3 points because of that, flop. Fall down. Flail your arms. Look like you have just been shot and die dramatically.
I mean, what's the harm. You're beat anyway and your are going to give up points so why not attempt to fake out the refs and get a foul that will nullify the basket. What's the worse they can do? Not call it?!?!
I am convinced that KG made some contact and that he did so with the worse possible part of his body, his hands to Gasol's mid section. I am also convinced that Gasol saw he was beat and was giving up an easy two and flopped his best flop. Technically a foul because of the contact. 80-90% of other bigs would have just moved back slightly from the contact. Gasol made it look like Garnett unloaded on him with Magnum.