Pro golfer Aaron Wise was hit in the head by Cameron Smith's tee shot during the PGA Championship on Friday ... but somehow, he was able to brush it off and finish his round!!
Smith was teeing off on the 2nd hole at the Southern Hills Country Club in Tulsa, Oklahoma ... when his shot went far to the right -- forcing him and his caddie to yell "fore."
Unfortunately, Wise -- who was at the 7th hole -- didn't hear the warnings and was smacked right on his head.