After I got back from the feed store, the rain had passed and sunshine emerged with a cool breeze. Climbed on Big Guy for a short walk and he really felt much more solid. He seemed a bit full of the devil and that is probably due to the drastic change in temps (much cooler now).
Reminded him that he needed to stand still for me to mount, especially as I am on my own at the barn during my rides.
Will try to get a longer ride in tomorrow.