TPiddy said:
In real life, I have a phobia of being able to move, but unable to move.... I don't know how to explain it really... I suppose it's claustrophobia, but I can go in elevators just fine. But ventilation shafts, tunnels, etc, no way in hell. I suppose I fear getting stuck or crushed and being unable to lift my arms to protect my face from something.
I've never really been tied up so I can't say if that triggers the same phobia or not.
I actually have this same problem. It's triggered the feeling of helplessness in situations where I have enough room to move around, but wouldn't be able to go anywhere or have full range of motion with my limbs or head.
For example, I had serious trouble watching the Mythbusters episode where Jamie gets buried in a coffin, because the thought of having that little amount of room to move and orient yourself terrified me.
On a similar note, one of the worst experiences I've ever had was being immobilized (seriously, couldn't move my head or body at all) on a backboard (the thing lifeguards use to move people with spinal injuries) as part of lifeguard training. I couldn't hear because of foam pads on my ears, I could see only the sky, and I couldn't feel anything around me. Not something I ever want to do again.