They gave the impression on Saturday that Alex had taught Kevin the whole dance, and I was thinking badly of Neil because he didn't hang around to help Kevin. Then I wondered whether Neil might have done some very serious damage, and felt a bit guilty that I'd thought badly of him. But both of my assumptions turned out to be wrong, there was a bit of footage of Neil giving instructions to Kevin and the injury turned out to be a 'tight calf muscle'. At first I thought he had torn his calf muscle, which I've done myself and it is fairly debilitating, it would be a bit unusual for someone his age and fitness level to do it though, it's much more common among the middle-aged (specifically in my case an unfit, over-50 who foolishly decided to run in the mothers' race on sports day).
Anyway, well done to Kevin for getting through the dance and even more well done to Alex for carrying on and not stopping in confusion every time Kevin went wrong.