ape $hit...

so I have this dream, which is weird because I hardly ever remember my dreams, especially when I go to sleep loaded, but I did. I don't remember the circumstances, like who I was with, where or why, but regardless of all that, I was tripping balls. It wasn't my normal third person perspective dream either, but a mix of first and third perspectives. I was looking at clouds and they boiled and rolled about just as they had that sunday, only this was at night. Don't remember how or why I wake up in the dream, just me thinking, "holy shit, I'm trippin and I'm asleep. " It was all very detailed and realistic. The question is how or why?