I can guarantee you this kid will not grow up to be a hoarder. He didn't like the look or feel of the pillow, so he threw it in the middle of a wedding ceremony in which he was the ring bearer.
This is a dude who knows how to make decisions on his own. He knows damn well he is the cutest thing at the wedding, so he decided to give the people what they wanted: a scene. Are you not entertained?
He knows he is too good looking to get in trouble. Nothing like a little flair added to an otherwise boring wedding ceremony. Well done, kid.