Apparently, he went to the washroom and as he pulled his pants up the waistband button came undone. Because his pants wouldn't stay up he decided that he didn't need them, or his underwear. He walked out of the bathroom into the playroom commando. The ladies in charge of the playroom are not allowed to touch the children, so they had to coax him back into the bathroom and convince him to put his pants back on - which was no small feat, since he really didn't understand the point of wearing pants that wouldn't stay up!!
I thought they deserved some dakbands.