Ryan Stevens wrote:
It's funny how you don't realize just how much a certain muscle group contributes to your everyday movement until you injury it!
I once pulled a stomach muscle in the center of my torso, right where the ribs part at the base of the sternum. I pulled it sneezing
Apparently you can't move your toes or raise your eyebrows without using that stupid muscle.
edit: I agree with Greg. Sharp, sudden pains are usually bad. See a Doctor.