I used to have these very vivid dreams close to waking up?

I sometimes still have these dreams, actually I'm not even sure they're dreams, but still... In these dreams I would realize that I am very close to consciousness, and I would usually start dreaming about something in my real life. It is usually very good, like a best case scenario vision. It has ranged everywhere from being good at a video game to finding out a girl liked me. It seems as though I am still attached completely to reality and everything that happens is quite possible, but it seems like everything went right. Sometimes I would wake up really quickly and jolt upwards from my dream, and fall right back into it. I would sense myself thrashing around, and sometimes I wake myself up completely if I knock something over. These dreams are weird, and I'm just wondering what they are! Thanks for any help! :)