things feel real while u sleep

This has happened to me on more than one occation. THis feeling that feels soo real and lifelike that it makes me wounder "did it really happen"? Im sleeping and in that deep sleep im dreaming of me running. I don't know what im running from or who im running to, all i know is that im running and it's dark. Then all of a sudden, I am falling. Falling down this long,very long well and it is endless. Just when i think i can scream another scream, i land on my back, so hard that it takes my breath away and when i come to, i see myself on the ground and i start to wounder how did i get here..am i dead?! And then somehow i can see myself going back into my own body and i start to breathe...and then i awake from my dream.....and i feel weird. Kinda like im still out of my body...but not out of my body..... and then when i try to recall my dream, all i end up with is a brick wall. EMPTYNESS. what does that mean?? have u ever had a dream where u are running from someone but everytime u look back to see this person-u can't seem to see the face, just darkness? I dont know what this means but my sister claims shes an expert (ha! yeah right!!) she says that if u cant see who ur running from then that means i need to take a good look at myself and see what's missing...that was long ago but i still have dreams like this. I even dream of snake attaching me sometimes. i read in a book about dreams that if the snake bites u, its not good. i forgot what it said.... happy mylotting friends