If I wasn't aware about lucid dreaming then I suppose I would be slightly worried about some small hallucinations that I sometimes get. More recently I have tried to analyse what is happening and how I can get them again. Please read everything before replying, thanks.
I get these hallucinations in situations when I'm really tired but fighting my body to stay awake. This is MAINLY the case.
It seems as though I am not fully asleep, I am awake and aware - but some part of me is asleep; in a dream like state?

This makes my surroundings look very surreal - and it is as though I am seeing parts of my surroundings that I shouldn't.. but these things overlap or are on top of what is really there. Which is why I came to the conclusion that part of me is still awake.
For example, I was sitting on the train on a long journey.. I was tired, but fighting myself to stay awake in case my stop was next. I would blink, and I could see minor changes in my surroundings.. such as; a drawing/sketch of an old man was sitting directly in front of me (or a ghost), the colours on the chair morphed to make different faces - as long as I didn't squeeze my eyes shut again everywhere would continue to morph or what ever. So these last only a couple of seconds.. until I sort of 'twitch' and I know that I am back in reality 100%.
Now, at this point I figured out how to take control and explore a little to see different hallucinations that I wont go into. But I was confident and certain that I played a part in what was happening. I explored a little.
This has happened to me before, but this was the first time I could actually take control and see surreal things when I wanted to. In this particular situation you could say I mastered it. I haven't tried since because I don't know how exactly to go about it, then again - I haven't had the time to think about that yet.

I was not sleep deprived, just tired - so that isn't a good enough explanation.
I was not on drugs or drunk.
It seems as though it is connected with lucid dreaming (obviously).. but what is interesting to me is that it was though I seperated what is real with my warped imagination.. but the reality never changed. The added surreal imagery was just overlapping what was actually there..

I am quite excited but I expect to see some replies that will crush this.

What do you think?

PS. Not sure if this is the right forum? So aplogies in advance.