It is a tragedy in the league of - oh, I don't know - Coleen's dress getting wet on her wedding day. By which I mean that it's not very nice for the person concerned but for the rest of us, there's a mixture of sadness and delight* inspired by the news. Chris Martin has twisted his knee.
The sadness is brought on by realising that he must be in quite a lot of pain. The delight comes from the fact that it's given Gordon Smart in the Sun the headline: Viva La Knee-da - a clever reference, you'll no doubt agree, to the band's new album title Viva La Vida. Also delight, or something in that direction anyway, comes from the fact that it may put Coldplay's "comeback" show (where did they go?) under threat. I doubt that he'll let it get in the way of the gigs. It won't, certainly, be any hindrance to his strangled wailings if he feels a twinge every now and then.
There is a moral to the story, too. Be careful what peculiar hobbies you take up when you're a rockstar. Apparently, Chris is into trampolining at the moment, which may or may not be the cause of his injury.
*Anyone want to start a sweepstake on how many people leave comments saying that it causes neither sadness nor delight, but disinterest?