There is never a sure thing. Learning to stand up and carry on to your goal after having the rug pulled out from under you is what growing up and becoming responsible and productive is all about. After getting over the "freaking" worry part I had my right leg shattered in my sophomore year at Webb down on the third terrace playing "touch" football. Four years, 5 surgeries, and 28 months in a leg cast later, I graduated from UofM. Not optimum, but I didn't loose the leg (a possibility), I don't walk with a limp anymore (or have an addiction to Darvon), have my PE, set a Guinness record for a human powered submarine, and married a beautiful woman and had healthy sons.
The starting goal is not the end, it is a target. So like archery or epee, aim high or you will always miss low.