Short Dreams & Daydream Visualizations

Ok.
The first question i have is pretty basic. i never have a dream that seems to last more than a couple minutes. they are always either intense (me jumping off a mountain, fighting someone) or filled with activity (real life GTA was my favorite lol). But is that normal that i only feel like im in a dream for a couple minutes. My dreams never feel like there over 10 minutes, n those are usually nightmares (son drowning, girlfriend leaving me). So whats the deal on that?

Secondly,

This really weird thing has been happening to me recently. Recently ive been in a lot of long car rides because i live wit my grandma and she lives like almost an hour from the closest town, and goes to town everyday. so one day, i was in the backseat cus i didnt get much sleep from the night before n was drinkin the night before so i wanted to stretch n lay out. well i started to try n remember if i put the bottle back in the liquor cabinet. at the same time, i was falling asleep. so im falling asleep as im thinking about this. n i have a stash spot near the liquor cabinet where once i take the liquor, i put it there for 5 or 10 minutes. well as im thinking about if its in the stash spot or i put it away, i go into like a 5 second dream. and i wasnt even sleeping. i was conscious but it was definitely a dream. and in the dream i walked past the stash spot n the bottle wasnt there. n 5 seconds later i opened my eyes.

the weird thing is, i know i was completely conscious. i was in my own body, felt myself laying down in the car, could hear the music from the radio, but had a complete dream/visualization type thing.

Im jus wondering if this has happened to anyone else before, or if they know how or why this happened lol.