Ashton is getting so big, and so strong, that he is constantly amazing us. If you are burping him on your shoulder, and he gets tired of it, he'll raise up and look at you as if to say, "okay, I've had enough of this." If you should continue holding him there, he'll headbutt you. Repeatedly. Until you give up. And his head's HARD.
We've also obtained documented proof that he sleeps with his left eye open. Not all the way, just cracked. But I guess it's good that he does actually sleep. Otherwise we never could.