I took the MSF course with a friend of mine who was a bit nervous about the class. She is a brand new rider and I'm some what new/inexperienced (probably only about 15000 miles in my log book, 7000 of those being in the last 6 months or so). I've spent quite a bit of time practicing low speed maneuvers, so I expected the class to be a breeze (fail #1). And in truth it was... right up to the point where I ate asphalt. I was on a DR-200 with nice fresh knobies (fail #2), which I was excited about since I really have my eye on something in the DR series 350, Z400, or 650. Being 6'1" and 350 lbs I'm sure that I looked ridiculous. The MSF course is a blast, but after they fixed the carb problem that I had on day 1 some of the day 2 drills started to feel a bit routine and I found myself pushing the envelope on the little, mighty DR bit by bit. When it came to the cornering drill that teaches you to brake to an appropriate entry speed and countersteer through a curve I thought to myself "Oh boy, wouldn't this exercise be much more fun if I just didn't brake when entering the curve and just really gas it on the apex." (fail #3) A few goes at the curve, which is intended for 10-12 mph, I was cooking through the entry at about 15 mph and pushing about 20-25 on the exit. The last of the curves in the drill (for me not the class) I pulled the same, stupid, shenanigans and came off in a low side. The instructor estimated that I was probably doing 23-25 as it came to the apex. I came down pretty good on my knee and twisted my knee and ankle, but I think that I cushioned the fall for the bike. Normally, I'm pretty good about being ATGATT but in this case I wore jeans instead of my TPG Escape pants because I was concerned about the heat (fail #4). I ended up sitting out the rest of the class not really able to walk and wondering if I tore some kind of tendon in my knee. My friend did pass the class, though! Not really any rash to speak of and didn't even tear my jeans. I ended up deciding to go to the ER later that night to get checked and make sure that nothing was damaged. All appears to be well but they have me following up with the Sports Medicine department next week and I'm hobbling around in the meantime. As soon as I can bend my knee reliabily under its own steam I'll be back out riding. Especially since I have a 6 day riding/camping trip at the end of the month. I took some pretty basic (also obvious) lessons from this. 1) Don't push a bike that you don't know. 2) Don't be afraid of a little sweat and heat... I'll be sure to wear my gear. 3) Respect the instructions of the Coaches; it's a basic training course not a chance for me to "have some fun", I was on their time and course and pushed it, in doing so, I held up the class and scared the hell out of a couple students. It showed a lack of respect for the Coaches and the purpose of the course. If the Coaches happen to be FF's, I'm sorry for that. Other than slowing down, I'm not sure that there was much that I could do to have avoided going down and I'm fairly sure that I would have been fine on about any other bike. Any other lessons that this noob should have learned from this? Feel free to throw rotten fruit/vegetables at me as well.