Hi guys. A couple of years ago I inexplicably developed Hydrocephalus - restriction between 3rd and 4th ventricles. I ended up getting a VP (Ventricular Peritoneal) shunt put in the right ventricle with the drain going down my neck from the base of the skull, down my sternum, and into the peritoneal cavity. They stuffed up first time by putting in a fixed valve which over-drained the CSF, collapsing my left and right ventricles completely resulting in massive subdural hematoma's. That was rectified by putting in a variable valve with an anti-siphoning valve and I've pretty much made a full recovery. But my brain has clearly been through a lot. Just last year I got back into riding after a dozen years off the bike. Everyone says I am a fool, but they don't realise how much enjoyment I get out of it. I got myself a good helmet (O'neal Series 8), Leatt neck brace, and all the other safety gear - but I'm most concerned about my head and neck obviously. Despite my best efforts, I have had a few stacks where I ended up bumping my helmet - but more glancing hits on the ground rather than full on headbutting the ground. That was until my last fall... With the last fall I had a high speed over the handlebars get-off. Fortunately my left shoulder took the brunt of the fall (breaking my collarbone clean in half in the process), but it's the first time head took a decent knock too. In the emergency room they did the neuro tests and I was fine, but obviously shaken. The doctor and nurse tending to me were not shy to tell me how much of an idiot I was. Same goes for my mother and girlfriend. And to cap it off my ortho weighed in with a similar opinion when he checked my collarbone out. So, anyone with decent medical knowledge - am I really being that much of an idiot? Am I really gambling with my life by doing any form of dirtbiking? Is there anything in particular I could do to protect myself any more (e.g. specific helmet type/brand, neck brace, etc? At a minimum I'll get a medic-alert bracelet stating I have a VP shunt together with its setting so that if the worst should happen the medics know what to focus on. After I have an accident, is there anything in particular I should be watching for? Should I demand to have a CT/MRI scan or trust the neuro tests are sufficient? Thanks in advance for your help.