So got back from 3 days at a music festival, got very pak'd needless to say. Wasn't too hungover on Sunday, did take a nap when i got home (mostly from 3 days of sleep dep) and take it pretty easy. Anyways, after a good pak, i sometimes will be a little sore in the lower back region. I always thought this was the ole Kidneys letting me know they've been putting in work. I was playing some Ultimate after work today and i started getting back spasms in the area i was a little sore, nothing really bad but i'm home laid up on the couch, now. Anyone else know what i'm talking about?