Today I had muscle cramps in both of my legs when trying to sleep, they went dead with pain, so I could barely move, and I couldn't sleep or rest either because of the pain. I wanted to sleep, but I was also cold, so I dragged myself around on two legs that were stiff and cramping. Usually cramp wears off after a few minutes, but I was getting sympathetic echo pain, each time it cramped it set itself off again. So it took a few hours for the pain to wear off, after that my legs were dead and stiff and ached but I was able to sit down and wait for them to recover. Still cold & sleepy, I hope my legs don't cramp up again when I try to sleep again. I'm not sure what caused the cramps in the first place, there are multiple possibilities. It might be from using too many covers to try and stay warm.