This was a very short session and my camera’s battery gave out just before the end.
I loaded Atty with the engine running and had my husband release the parking brake and take the truck out of gear so that the trailer would move slightly. He did this a total of five times, then the engine was turned off. I walked to the back and opened the back doors. I came back and treated Atty, then walked back to take down the butt bar. While he did not rush off the trailer, he did not wait for the cue either. He loaded again and, this time, he waited for the cue to back off.