First one is obvious. Thumbs down. Not good.
Next is one thumb up. Not bad.
Two thumbs up is pretty good.
Two thumbs up crossed is very good.
And ironically (and contrary to the weird look on his face) the "no thumb" is actually the best rating.
That kid cracks me up. I don't know where he comes up with this stuff. I wish I was better at remembering and retelling some of the crazy stuff he says and does.
Gotta love it. ;-)