I’d never seen this behaviour before, which is not a scientific observation, but I have been watching Canadian Geese since I was knee high to a grasshopper.
It was obviously part of the mating ritual with a look at me and how clever and masterful I am stance, it was hilarious to watch. The main aim of the game I think was to masterly flip over onto one’s back, wave one’s webbed feet in the air and then turn back over to rapturous applause from one’s mate. Then to have a couple of seconds breather and do it all again. They carried on the game for quite a while before being disturbed by another pair.
As always the light was rubbish, we are in the middle of woods so its even more rubbish, so the grain is heavy.