this has NEVER happened.... all of a sudden thank goodness before i was descending, i felt this back spams on mid back, i was wearing a lowerback brace as support and tummy tucker usually.....
almost like a muscle cramp and i had to immediately rack up than it kept cramping for the next few hours even now if i try to straighten my back and not slouch there is some pain like the cramp won't go away.....