I turned out Felix, Jacko, Charlie and Hector, no big deal, and it was a nice bright morning, and actually a lot calmer and less windy than it had been. I came back a short time later to find skid marks all over the field and around the track, and Felix very sorry for himself with a sprain which he had obviously done just a few minutes earlier. Everyone else was fine, and I would before yesterday have put money on Felix, of all the horses I know, being the least likely to slip or trip in the field, but I suppose even the best can have off days.
He is iced and ant-inflammatoried, and will be confined to quarters for a few days at least - I am just hoping it will settle down as quickly as it came up (!)
Updated to add that he is much better tonight, heat is much reduced and he is weight-bearing on it - fingers crossed ;-)