If Keith Richards had to be injured, it seems somehow appropriate he'd do so falling out of a palm tree. The only thing more appropriate would be if he fell out of a palm tree and landed on Steven Tyler.
Apparently he suffered a minor concussion, and when interviewed after the accident said, "Wha? I'm not so sure wha ... I think I went ... Blimey! You shoulda seen the [unintelligible] ... Gotta smoke, mate?" Oh, wait, that was actually before the accident. My mistake.