Grade: 2
Pulled muscle bottom of back, very painful stabbing pain to twist or bend over, but nothing too debilitating once moving.
Constant movement seemed to help. Spoke with some sports genius who said is was a mucle pull, and that inactivity is the worst thing for it, although thats all it makes you want to do. Its faded to almost nothing now, and I imagine it'll be gone in the next day or so.