One of the reasons I am not convinced is that the "Auto" setting just alters the ride height or pre load according to the weight the bike carries ( unless I am very much mistaken) Dynamic suspension setting firms it up a bit but just means that the rebound or compression reacts faster to the road surface
So unless there was a big glitch and it "adjusted" itself when it shouldnt have ........
But As said Nigel is hugely experienced ex plod class 1 etc etc so who am I to argue .....
Your mates do seem to like a good crash when on holiday

Are any others members of the Northern Trippers & Tumblers Society?

It is just one of those 'moments' and hats off to him for having the balls to post it.