This was something different. Today, I took Wally out to an open field and just waited for him to do something. When he did, I tried to go with it and see if I couldn't get him to extend it.
He started with his usual, the typical sitting and such that usually gets him rewarded, and I did reward it here as well. After a while, he was like, "hmm....what's up here?"
I pretended to ignore him and he sat next to me. I kept acting like I was looking at something and then he stood up on his back paws. I kept looking in the distance and he waved his paws up and down like "hey, I'm over here!". Turned and clicked and gave him a treat. He kept standing up. I held out for a little while and he started with the paws again. Another reward.
Next, the tail started going. Usually, this is a precursor to his barking (he always "winds up" his tail before he starts barking). It wasn't quite a bark, but he did make some vocalization. That got him another reward.
Then, I went back to "ignoring" him. He sat down for a moment just looking at me. He sort of "gruffed" and started looking around. I suppose he was looking for an object to grab or poke. He went over to the monkey bars (we were near a playground) and pawed the base. I rewarded that. I was hoping he'd act as though he'd climb them, but he didn't.
He came back. He sat, but I had gone back to the pretending again. He lied down. Still nothing. He tapped my foot with his paw. I looked at him and rewarded him. He did it again. Another reward. Again, but this time - nothing. Next, he put both his paws on my foot and barked. That got rewarded.
After that, we had some fun just running around before going back in because we were both getting quite hot.
Next time, I will have to do this near a light pole to see if he incorporates that into the things he offers!