Broken ribs are no fun. About 12-13 years ago, another kayaker speared me in the side while I was surfing Hell Hole on the Ocoee, breaking my four bottom ribs and displacing the bottom one so that the two pieces over lapped. (I unintentionally reset it during the night, using a rope loop I'd tied to my camper roof to turn over.) I also had a bruised left kidney. I had to rent a hospital bed for 4 weeks. Couldn't get up on my own. Needless to say, I couldn't do much of anything for a long time, much less think about playing BB...