Interesting thread.
I've had dreams, similar to the powerless punches ones, where I've been in a situation where everyone around be is being shot down, and I'm invincible. Yet when I walk up to the shooter, I can't do anything. My arms are locked, and I can't get close enough.
Last night I had one where it was a weird combination of high school memories and this idea of restrictions. A lot of students, including me, were getting picked for floag football. Goes on for a while, and then I finally get to play. But my arms lock up, and they are stuck to my sides at the elbow. Everyone laughs and then my dream shifts to a completely new scene where I'm someone I've never seen before. I'm an older man, who has the same problem with the locked arms. I'm some kind of janitor at a hospital, and everyone harasses me for a few minutes before I wake up.
Strange dreams that really stand out to me. I've had the standard falling or running dreams, but never the locked arm stuff.