A bizarre enough one for me to remember. I was in the backyard, and my parents had decided to give me a gun as a gift for some reason. It was a revolver, and it looked like it was made of 3d-printed parts. It was surprisingly large and hefty. The bullets were of small caliber, and the gun could an abnormally large number of rounds. I think 12, but certainly more than 6. I don't know how that's physically possible, anyways. I also noticed that the bullets used black gunpowder instead of the modern stuff. Possibly because black powder has far less power, and less likely to explode the gun, being mostly made of 3d-printed plastic, but that's just conjecture from after I woke up.
I remember my parents saying something that pissed me off, so I left the gun and went inside and then woke up. I was laying in bed for awhile when I remembered something, and managed to go back to sleep enough to have more lucid control. I went back outside, where it seemed some kind of party had started; there were little kids running around everywhere. This of course, pissed me off even more. I found that my parents had moved the gun, but I easily found it. I went back inside with it, making sure to keep my fingers out of the trigger well. For some reason, I ran into one of my more irritating coworkers, I don't know why he was there. I ignored whatever he had to say, went to a nearby table, opened the cylinder of the gun and ejected every bullet. I then inspected each chamber to make sure it was empty, then showed it to my coworker for him to inspect the chambers. Then I started to disassemble the gun as best I could before waking up.
I generally don't like guns.