Things happen, brother. But you and I and everyone needs to remember that this is quite literally a dangerous profession we are in. When we get too comfortable, we relax. Not always a good thing. I myself admit to being too comfortable, thats the reason I have gotten hurt. I have taken risks because I was too comfortable in my abilities. Learn quick after that first time. At least until the next time.
Please relay my families condolences to your friends family...
