David, yes we did see that. We sat and watched for about 20 minutes, then my friends left.
Later that afternoon as it cooled off, I went out and forward progress had stalled out. They were in the shade now and circling the wagons.
Just checked on them this morning, and the mass outside is still alive. The sun
should be on them in a bit, hopefully they will carry on. My friends said it could take more than a day.