Hey folks. I have a 99 YZ 250 that I purchased about 2 months ago. I hadn't had a bike for about 10 years and boy I missed riding. I'm 34 and I don't go crazy or anything. I rip around sometimes, but I know my limitations and skill set and thus I keep it in check. lol Here's the deal... Sunday I went for a quick ride on some trails for about an hour before I headed back home to do the family thing. I was riding pretty easy, and most the trails were 1st or 2nd gear 90% of the time. On the way back into the trails I had to go across a real sandy area that had a bunch of whoops in it. I got on it a little to stay up on top the sand and for whatever reason the throttle took off on me. It wound up and just started taking off like a rocket. I got the throttle rolled forward and luckilly for me I was in a wide open space. It went back to normal and I chalked it up to a freak deal. I rode for about 30 more mins just riding trails and not shredding around or anything. Just enjoying the day.... Then, I was back in tight trails.... I had a couple small whoops coming up and a short straight-away. I turned the corner and "Brrraaap" on the trottle a bit and she wound like a SOB and took off! I didn't even have time to say "OH SHEET" - I was positioned myself on my bike to hit the whoops and clutched, braked and tried to whoa this runaway rocketship.... The last thing I remember was the front end washing out and starting over the bars. I stuck my hands out and thats the last thing I remember. The last thing until I woke with 4 riders that came across me and rendered to my aid. I have no idea how long I was out. How long until they found me, or anything else for that matter. They called EMS and they came and took me out. I didn't realize how banged up I was. I got some pretty bad lascerations, broken bones in my face, and I had to reschedule my Glamour Shots for awhile. haha... No, I wasn't wearing a helmet and Yes I know even though I wasn't shredding or roosting around I should have had one. But, subsequently I didn't... What on earth could have caused it to do this? Your input on the problem would be much appreciated. Thanks!