I have pulled my right hamstring twice back in the day running track and playing baseball. I never pulled the left until two weeks ago. Have to blame Rasmussen and Burandt on this one. I was doing the down hill turn where you stick your leg out and as a pivot. I did one before in the day, worked slick. I went to do it again with my left leg, as soon as I extended my leg it was like the whole muscle let loose. I still completed the turn thankfully as that would have been a bad spot to get unstuck. Glad I was on a sled because I could not walk for close to an hour. Getting back home and I realize that the back of my leg is black and blue with a yellow tinge. I tore something enough for it to bleed internally, sucks to get old. 3 weeks later and I am almost over the pain.