Apparently there are some nightmares that we will all have, at some point, in our lives. These are:

Being attacked / fleeing from a pursuer
Getting injured / being ill / dying - especially teeth falling out
Trouble with a vehicle - car crash, plane crash etc.
Damage or loss of house / home
Terrible performance in a test / at work
Falling and / or drowning
Public nudity / being dressed innappropriately
Missing your plane / boat / transport
Technological malfunctions - machinery breaks / telephone can't connect
Natural disasters and / or war / nuclear holocaust
Getting lost and / or feeling trapped
Ghosts / spirits of the dead haunting you

At least the rest of the world dreams and screams along with you. What about those nightmares that aren't universal and you wake up thinking, god, where did that come from?!