crazy ass non lucid

alrite so i dont know how i got to this point in the dream but i was driving down the highway in my stepmoms station wagon and decided to crawl out the back and stand on teh rear bumper and just stand there because the car magically drove itself, which is why i am confused i dindt become lucid but lucids usually come in normal situations not crazy ones...so i was standing on the rear bumper and i closed the door ( this station wagon has a trunk door that opens into a seat) and was standing there for a while, then i started to get scared because i realized what i was doing but i couldnt open the door so i just held on, it seemed like i was actually in this dream for as long as it would take me in waking life to drive from point a to point b which is bout 20 mins then the dream faded and i woke up but this was a crazy ass dream, unsure if it was a nightmare or just a scary dream