In case you haven't seen it before, that is what I like to call a "Welch tongue". It comes out when a Welch is thinking or working hard at something. I've seen Christina do it and I've seen her dad do it. Carissa's last name may be Ayres, but there is Welch blood in her for sure :)
This photo was from earlier this week, on a windy but much warmer day than today.