Quite often I'll be in a fight in a dream, and I'll have no strength, so I'll be punching someone and it won't do anything. I think it's to do with feed-back from the sleep paralysis.
a common theme for my dreams is trying to shout for help, but i find that i'm mute. or, i'll try to make an emergency phone call and the phone is broken. i guess it relates to communication difficulties.
strangely in my dreams (at least the ones that aren't erotic dreams about
you ) i never ever have commmunication difficulties, i can always talk just fine and people understand what i'm saying. it's in real life that i'm mute or can't get things out or people misunderstand.
i often have the lack-of-strength dreams where i can't walk, but i get that in real life too
also bizarre university dreams, where i'm at some strange university, either wandering through strange buildings or amazing landscaped grounds. i had one of those last night, only there was a flood and i had to rescue some goldfish who had escaped from their pond. then i woke up.