Sounded like a nightmare.

I can recall having such dreams--not recently, not yet. I think it's like mentally exorcising a fear.
When I was in school (1st grade through college), every time we were due to go on a field trip I would always have a dream that I was running late, or forgot, or something and thus missed the field trip. I did actually miss a field trip once when I was in first grade. My mother took me where we were going but I never caught up with my class. Traumatic event, perhaps?