I've broken my nose, I've broken ribs. You name it. In fact, we just got back from South America, and I fell over a monitor speaker on the stage and almost ended up in the front row of the audience. I managed to sprain my wrist on that one but luckily nothing was broken.
If someone is interested in medicine and also in physics and they like working with people and communicate well with others, I would strongly encourage them.
Great designers seldom make great advertising men, because they get overcome by the beauty of the picture - and forget that merchandise must be sold.