I know about this 'feeling' too! It's a very strange experience and like you, I have no control whatsoever. I've tried dream spinning, but it's useless for me in this situations. The best thing I can do is force myself to wake up. I have tried several time to maintain this 'state' for some time, actually with good succes. However I'll not recommend it because when I do this, I'm really bombed when I finally decide to wake up, and that whole day feels like a day, where you have slept to much.

Unlike simonster I do believe it's a dream, however it's the ending you are witnessing.

I think this 'state' is the result of one's wishes to become lucid at the wrong time. Let me explain. When you are beginning to wake up (the time you normally wake up in the morning) the 'logic' part of the brain is ofcourse waking up too, and that's is when you are realizing that you are in fact dreaming. This causes a great deal of exciment, and you therefore try to maintain the dream. Hoiping to get lucid. However the 'normal waking up cycle' (which explains why you can hear things) has already started and therefore it's a struggle to hold on to the dream.

However I have no scienetific documentation on that this is actually what is happening.