Such dreams do seem fairly infrequent, and quite interesting.
About a decade ago I dreamt that I was in a moon colony, the US discovered us, didn't want to acknowledge our existence, and instead decided to nuke us. As everyone tried to escape by swimming away in an ocean on the moon, I realized there was no chance of getting away, so I stopped swimming, felt myself sinking into the water and drowned. It was actually a fairly peaceful experience in the dream. As mentioned in another thread, I then went on to be in another dream, with memory of the last, like dream reincarnation