My dreams are really vivid, and I don't remember the vast majority. Sometimes they're worth remembering, but they just don't stick. And then a few you kinda wish you could forget.
The most common upsetting dream is the failure-at-the-job dream. In talking to my colleagues, it seems to be a shared experience.
A dream I had within the last few months was a doozy. Grandma had left early for work, and I woke up to the garage door opening.
I wondered why she was coming back early. She came in the room, talked to me, and I was getting out of bed and getting ready, but things seemed pretty strange. I woke up, thinking, wow, I can't remember the last time I dreamed I woke up.
The garage door opened, and I figured I must've dreamed that she was coming back early because maybe she'd called me while I was half-asleep, and it sunk in, in the form of a dream. She came in, and I got up, but things were weird. And then I woke up.
Okay, that was really unsettling. I better get on with my day. This will be an interesting one to tell others, if I remember it. Then I hear Grandma coming up the stairs, talking to me. When did she get home? And then I woke up.
Okay, now I'm frazzled, and I better get up now, and I start to, and Grandma walks through the bedroom door, and I yell and jerk myself awake...
For real this time. She was sleeping beside me, and the sheets around me, the air I was breathing, the rustly sounds of the world, were unmistakable. I got up and got ready for work.
No, really, that time I did. But I have to say, it was one of the weirder dream experiences I've ever had, and I've had some strange ones.
ETA: I remember when it was. The last Friday the 13th that we had. No, I'm not superstitious. But that was when it was.