I have regularly fixed my cars in my dreams, and usually it is something I am struggling to fix in real life, and the dream solves the real life problem. Usually after I fix the car in the dream I go for a drive, and I always have issues with the brakes (it's like those running dreams where youre running through molasses, but it's that I can't push the brake hard enough). I end up backing into things and dumb stuff like that.
I've had a dream or two where I realized I was dreaming and then looked at my hands. Because someone once told me you know if you have lucid dreams by looking at your hands during a dream.
I've had 5-6 very scary (to me) semi recurring dreams in my life. They involve me feeling like I wake up, while still lying on my back in my room. Something is always blatantly unreal though, like my college roommate is in the room sleeping in another bed or something like that. Then, while lying there seemingly awake, waiting to go back to sleep, I'll feel the bed move. When I look, I see impressions in the bed, like an invisible person just stepped up on the foot of the bed. I feel and see the invisible person walk up the bed slowly, one foot on each side of me, until they are standing right above my chest.
It's about then that I will get the feeling that if I could only move or make a noise I would wake myself up and this would all be over, but I can't (my earlier versions of the dream I felt like I could get someone's attention rather than wake up, but in the more recent one I recognize it's a dream). Sometimes, I will get a flash of the person standing there, an old woman wearing tattered bathrobe/dresses, but she will be in no varying color, just solid gray. She does not look necessarily like she wants to hurt me, really she has no expression I can make out.
I eventually wake myself up by making a loud (in real life too) noise or by a jolted but exaggerated movement. If my wife is there I will wake her too, but I've probably only had this dream 1-2 times with my wife there with me. Interestingly, she is not in bed with me during the dream, that can be the blatant unreal fact. I've had this dream in at least 3 and maybe 4 different rooms/houses, and the dream always matches the location I am currently sleeping.
I have a few others too if you're interested, a couple recurring "flying" dreams, and another slightly scary recurring one from when I was a kid, if you are interested.
P.s. I don't know if it was intentional or not (wink wink), but you left a copy of realmwalker 2 in the xjr. I started reading it on my flight on Monday, and so far I like it!