What is this type of dream called.

I have always just accounted this to my sleepwalking but I'm sure this kind of dream actually has a name.
For an example I will use my experience last night.

I'm laying in bed asleep then I wake up and look to the end of the bed. I see a mouse running in a zig-zag patter towards my face and it's moving rather fast. Once it gets up near my face I take my comforter and wrap it around the mouse.
I turn the light on and of course there was no mouse there.

One of the other ones that my wife loved was when I was hanging off of the bed with my hands out. I was trying to hold up the wood (I was currently building an arcade cabinet) so that it would not fall down. My wife simply walked around the bed and just helped get me back into bed and I wen right to sleep.

I'll do this quite often and I'll see things that aren't there but are really in my dream world but partially to me in the real world.

Anyone know?

I usually refer to stuff like that as "residual dream imagery". It happens to me every now and then. In my experience, it is when your waking world senses kick back in, at different times, and leave you seeing (or hearing, which happens to me sometimes, too) things from the dream state. It usually just takes a few seconds to fade away.

I think I know what your talking about...
Once when I was little I saw this weird glow in the dark tarantula thing. My parents searched my room for ever and couldn't find anything. It was weird because it didn't feel anything like a dream.

That's exactly it!
There are times when I can't tell the difference between reality and dream. Some times they are short episodes others they can go on for several minutes. Most of the time I don't remember anything happening until my wife gives me some details as to what I had been doing, then it pops right in my head as if it really did happen.