I was sitting there in bed with my arms behind my head, I was concentrating on my breathing and was trying to see little lines or something in my eyelids(your supposed to do that, right?) but whenever I thought I was seeing something in my eyelids I realized it was in the back of my brain. So I started to do this thing I read in a thread-imagining going down stairs and counting them as I concentrated on my breathing-but after about five minutes of trying that(about 20 minutes in total) my upper body started to hurt and not just an unpleasant hurt but a I feel cramped and need to move or it will hurt more kinda hurt. Is this normal or bad and what am I doing wrong? Am I supposed to see stuff in the back of my head or in my eyelids and was I in some sort of bad position to be comfortable? And does that trick with the stairs really work?