Couple years ago I grabbed a bag of salt at work, strong arming it with one arm, but at the same time grabbing it from the corner of room behind some other barrels. Bam! Pulled an intercostal rib muscle. I've done it before in the gym but not as bad. I could barely walk and if I twisted my torso or moved the wrong way, it nearly brought me to my knees. I was close to crying it hurt so bad. Went to the ER hoping they could inject some numbing meds, but they did nothing. Said to ice it. Took a few days to get better.