Here are three (two injuries and one ALMOST)
1) One of the team members was using the soldering iron, and he hit it off of the table. common accident. Then in all of his cat reflexes he grabs it before it hits the ground

Of course he grabs it by the actual Iron part. Ouch.
2) a Simple request I had for another team member. "Yo, throw me over the drill" we were all pretty much sitting on the carpet working on whatever, I had to put some screws into the ramp from last year when we were making it. The first person I asked ignored me, then the second person, in all of his Senior intelligence decided that he would fulfill my request to the letter, so of course the next thing I know there is a Battery Powered, airborne, coming at my head! I moved away as fast as I could but it still got me, right in the thigh! I had a hole IN my thigh! I could see bone I swear!! luckily it didn't hurt much after the initial shock and it didn't bleed too much. Still I use that incident as a "Remember when you threw that drill into my leg, yeah, I think you can drive me home, you owe it to me"
3) Last year our bot had a reallly big Claw to pick up the big balls, and our was of course pneumatic. Well it happens that pivot points, leverage, and unregulated pistons make things move fast. Well we didn't have any flow control valves on the claw when we made the prototype. The first time we tried it a few of us gathered around to see! Well one person got a little too close and the claw moved so fast and with so much power, it made him deaf for the next hour in his one ear. Ya see we failed to notice that when it closed it would end up being mere millimeters away from this certain members ear, if it would have been any closer we all swear it would have taken off his ear!