The car crash was like something out of a horror movie - the Mercedes was going at a ridiculous speed (think Fast and Furious, but without the fancy driving skills), and the driver, Henri Paul, lost control of the vehicle, crashing into a concrete pillar in the Alma Tunnel in Paris. Rees-Jones suffered a massive brain injury, a punctured lung, and memory loss - talk about a bad day!
Rees-Jones doesn't really remember the crash (which is probably a blessing in disguise), but he does recall waking up in the hospital with no idea who he was or what had happened - it's like he was a real-life Jason Bourne! He had to relearn how to walk, talk, and even use the bathroom - it was like being a newborn baby all over again.