Amazing isn't it. I have about six more videos that I took at the same time until I couldn't stand in a bent over position any longer
And anyway, they were all the same. It lasted for a good 90 minutes. Then the temp rose, the sun came up and there was a bit of a breeze and it then behaved like its neighbours ... just a bit of gentle movement in the breeze. We thought about underground critters too (what though?) but then look at the way the plant moves and that doesn't work either. Very, very strange.