Yes, every once in a while I have that happen and it "is" a challenge. I sleep with the television on at night so that when I have strange and upsetting dreams or night terrors I can focus on what is on the TV as a way to bring myself to the "now" and get my mind out of being trapped. That has been my only way of grounding myself when trapped in a bad dream where I can't just get up and get out of it physically.