Open the gates.

Coming down the stairs, I arrive at the same time an elevator opens at the other end of the hall: two adults, one stroller, one toddler. The toddler looks my way. I wave. The toddler starts coming my way. I wave again, and one adult tries to stop them, then gives up as they keep going, fast as they can, the adult following just behind as they finally get across the long, long hallway to reach me.

The adult with them advises reaching out a hand for a high-five, and the hand's offered. I give them a handshake, saying it's very nice to meet them.

And we're all on our way, happier for it.