Last night I had one of those dreams where you're being attacked and you need to yell and fight back and run around but your body doesn't respond and all that comes out of your mouth is incoherent grunts. Mrs NoCo says I was thrashing and barking in bed. I've watched her do this before. So weird.
You're aware that your arms and legs are restrained (by blankets) but in the dream that's not the explanation that comes to mind. Not sure though why your mouth doesn't work -- it's like you have nerve damage or something. Or maybe it's genetic memory of our prehistory when barking was the best we could do.