First post, blue shirts from Bernie Sanders rally. His arm is not raised in a prideful fist, but his visible left hand is clenched in a fist at his side. His other arm is around Mom Sarah. It could be nothing. Or maybe the possibly RAD boy who gives free hugs to strangers is feeling anxious or stressed while the group photo is being taken with him showing affection for Mother. It could be an "excited utterance" of the hand without raising the fist. Say "revolution!" instead of cheese or smile, maybe. But it does stick out to me.