Last night I went to bed at exactly 8:00 pm and at around 8:10 pm I was already in a super vivid dream. It didn't feel like a dream, it felt I was actually there.

In the dream I got off my usual bus stop, and some guy behind me was following me and as soon as I see him I scream and I could hear my self scream in the dream. Then I fall down on the floor and I could see the guy coming near me, then my eye lids in the dream start to close.

I start panicking because I think im dieing, as soon as i cant see anymore, it was as if I was in a all black place but i know im not in a dream anymore or im not awake?

1. First I want to know, how I can have such a vivid dream in less than 10 minutes after getting in bed.

2. When my eyes closed in the dream, and everything went black where was I? because I knew the dream ended, but I wasnt awake?