One I used to have occasionally was about football. I was running down the right wing on to a pass but could never, ever, EVER quite reach it, and it all happened in slow motion. And why the right wing? I could no more cross a ball with my right foot than I could speak fluent Basque. It was for standing on. Not a very good footballer.
(nights) I wouldn't worry if I were you, it's probably just an irrational fear of your life slipping away followed by eternity in a cold dark hole in the ground, while the people you knew and loved, move in like jackels to pick over the remains of your life. Personally, I like to bear in mind what Hume said, which goes something like "don't try making sense of it all, just go and play pool instead."