I don't want to imagine getting hit anywhere in the head by a drive from a pro, especially early right after they hit it. I was at the Wells Fargo tournament here in Charlotte several years ago and had positioned ourselves down the #10 fairway appx where drives were landing so we could see them tee off, then walk up and hit their approach and see what they did on the green. Padraig Harrington hit a ball and then shouted "fore right" and it went past us in front and then off into the rough and some trees. Next, Adam Scott, hit, same thing. I turned to sort of shield the elderly woman next to me when it felt like my left shoulder exploded. Got hit by his drive on the way down, so had to have slowed a ton, but it still felt like a gunshot and I had a horrible bruise about the size of a grapefruit and it was all kinds of purple and black where he hit me, and sore for several days. I try not to take it casually if I hear "fore" in my direction now!
I still swear that shot changed Scott's round. It was cut day and he was 2 over the cut # at that point. A bogey (what Harrington made) or worse, I think would have doomed him. Instead, the ball bounced off my shoulder into the first cut far enough back that he could clear the trees that would have handcuffed him had it continued on it's path, and he hit a nice approach and birdied. Got a couple more on the way in and made the cut by a stroke or two. The next day he shot like a 63 and ended up around 10th and I think won around $230K. Barely got a "Sorry" out of him. I think Mickleson would've at least given me a signed glove with $100 tucked in it.