I don't think it's here so I'll just add it. Sore joints. Seriously, I don't know what my body or brain gets up to after I fall asleep but the sheets are rumpled, blanket and pillows on the ground and I'm curled up in the center, muscles and joints locked up and aching. After I wake up though, I'm awake. 2 hours of sleep, 8 hours, doesn't matter. Brain is awake and it won't shut up.