It's refreshing how excited kids get when they run into their friends outside of school. I watched two kids spot their friend in the shop across the way and their eyes got big, they looked back and forth from their mom to their friend, just chomping at the bit to run over and say hi. Their mom gave them the go ahead and they could barely stand it. They ran over, stopped a little short -- a safe distance from their friend in this unfamiliar environment -- and just waved at them. Smiling ear to ear.
They all then ran back across so moms could awkwardly meet moms and the kids just couldn't get over seeing each other.
I'm gonna try to be as excited when I run into people unexpectedly. Honest.