In a dream, I'm leading a marathon (even though I'm not nearly good enough to do so, and my name ain't Rosie Ruiz). At some point, many miles in, I recognize some place from the past (once, my college dorm), and I go to check it out. I completely forget I was leading a marathon, and nobody tells me. There's really no interaction with anyone. When I remember the race, minutes later, it's too late to even try to continue and expect to run well. This dream pops up when I'm training for a specific race.
It's a fear of failure thing, related to my own non-elite performance capabilities, and only in my dream.