Here's an article about calming signals: Calming Signals Community
How many have you seen your dogs do?
Here's some others I've seen Wally do:
Walking/Moving Slowly - especially if I start getting a little agitated in training or he's having a bad day.
Play bow - including sometimes running all fast up to me and then going into a bow and then coming back up. Probably a signal that he didn't mean anything by running up to me. Also sometimes if I'm just looking at him and he's barking, he'll bow and bark, not sure if this is play or he's saying "I'm not barking AT you, just want to tell you something" or "I'm just excited!"
Freezing - I see this a lot if I catch Wally doing something I don't want him doing, and I'm like "HEY!" He won't get away from what he's doing, he'll just stay there, like a statue. If I direct him to come to me (I don't use recall of course), he'll move slowly (another signal) and sometimes lie down waaaay away (more signals). I've also seen him do this is I'm walking towards him to get him away from something (say food on the ground) and I walk towards him as he's backing up, after a while, he'll just stop moving. Then I'll stop.
Sitting down - Wally will do this too if I get a little to "animated" in my training. He'll slowly sit, sometimes yawn. The only time he sat with his back turned to me was when I first started walking him, he wanted nothing to do with it lol
Lying down - pretty much the same reason as sitting down.
Walking in a curve - all the time, he'll do this if we're walking near each other and if there's room, he'll curve around me instead of just passing side by side.
Might have seen some of the others too - just can't remember off hand