I think Moogle is probably right there. That seems very likely. I also have another theory; As we know, things in dreams are not simply day residue, but are hints and manifestations of deep down thoughts, urges, and fears. Maybe the difficulty you experience in trying to move is a manifestation of a lack of confidence in yourself, or something about yourself, like your flow or ability to gather momentum on a project. I can relate this to my own experiences. I have never been in a real fight, and therefor don’t really know about how competant I would be if someone were to attack me. I usually think quite logically and am quite certain that I would do very well, but there is a doubt in my mind. This doubt manifests in my dreams whenever I try to punch someone. The punch is always really weak and slow, and hits the target with all the force of a balled up pair of socks thrown gently across a room. I know it’s to do with this doubt in myself, because in the odd dreams where I’ve been someone else, I punched very very well. Maybe you should ask a dream character about it, to see if it is something like this.