It does not matter whether your legs are bound up tight by something or not.   If you feel the need to move them, due to pressure, or for whatever reason, but can not budge them, you fight having a panic of claustrophobia.  Your brain does not care why you can’t move, it only registers that you can not.  This is what I have learned in recent months.  As with all such things, if you are stuck with the situation, you still survive.  I have not heard of anyone dying of claustrophobia lately.  Surprisingly, laying in bed, under covers, is my most bound up, immobile time.  Rolling over without Mary’s help is becoming impossible.  What will it be like when I can no longer move my arms and hands?  How tight of a cave can I stand to be stuck in?  I have no idea.  I used to like spelunking.