Big Bang Theory Star Kaley Cuoco Falls Off a Horse

kaleycuoco_120.jpgOuch. The Big Bang Theory has lost its nerd pin-up to a broken leg. Over the weekend, co-star Kaley Cuoco injured herself during a horseback riding mishap. No worries, though: She's expected to make a full recovery, and thanks to some laid back scheduling, will only wind up missing one episode. [TMZ]