Like Elaine says, how do you feel about the dream? Are there any symbolic parallels to your life?
I often have vivid, crazy dreams and when I tell people about them (sometimes I get killed), they go "What a nightmare!", but they aren't nightmares to me.
And then I have other dreams that are much less violent and dangerous, but where I feel terrible afterwards, and those are nightmares.
And sometimes, dreams are just dreams; the brain's way of cleaning up.