I have had this experience (not a lucid dream) whereby my mind thinks im awake and i can hear everything around me, but my body is still asleep. Its really wierd, my breathing is completely automatic and i cant change it, i cant move anything and if i can it feels like im pulling a car.
To get out of it and try and go to sleep and force myself out of the dream.
Strange stuff, but kinda cool.
Another time, has only happened once, is when i woke up in the middle of the night, not late around 12.00am (this was when i was about 10 years old). I woke up and closed my eyes and about 1 second later it was day time. Really strange cause it wasn't like the curtains where closed and i thought it was night, it was really night and i closed my eyes for a second and opened them again and it was day.