"I'm sure many of you will have found yourself in hospital, not having planned to be there," Clarkson says. "But for me it was a new experience. And a weird one. Because I was in a room with nothing on the walls except wallpaper, and most of that was coming off."
"This is the problem with hospitals," he says. "People who stay in them become institutionalised and incapable of speaking about anything other than what nurse brought what drug at what time. Boredom turns them into bores."
"And when they get out, as I have, and there is nothing to do for two whole months apart from get better, things are even worse, because all I can talk about is my illness."
With a long recovery ahead of him, Clarkson has told readers on Drivetribe (a "digital home of all the motoring tribes under the sun") he will be "out of action for quite some time".
"It's really, really annoying because I've never had one day off work since I started in 1978," he wrote.