I have ruptured the bursa sacs in both of my knees over the years crawling in attics and crawl spaces. I've herniated a disc or two in my lower back from lifting awkwardly and from sneezing real hard while contorted in a cramped space. I lost my left eye 23 years ago while building board fence. I was wearing safety glasses with side shields but it was hot and I was sweaty and the glasses kept sliding down my nose as I bent over to nail the bottom board on. A cement coated 16d nail riccoched and went in my left eye just over the glasses. Be careful and exercise common sense and something will always jump up and bite you on the butt anyway.
