OH yes several times!! One time I did it I finished up in a neck brace for three weeks!! If I sneeze too hard, I throw out my trapezius, which causes problems all they way up my back and over one shoulder. I've done it every summer for the last three or four years. This last time I was treated with acupuncture, muscle relaxants and serious pain killers. I felt like I was drunk for a good fortnight! Not fun!