Why do revelations always come in the middle of something else important?

I'm serious.

Haven't you been in the middle of an exam and remembered that thing that you had to drop off at that place the day before?
Or been in the middle of a concert or a movie and realized you haven't called so and so back?
Or been on your way somewhere, a serious car/train/ or plane ride underway when you realized that first, you were supposed to deliver that important message?

Or maybe, like today, you're in the middle of studying for that very important exam when you get an inspiration for a blog post...which may not, in fact, be that much of a revelation anyway, and may in fact coming across only as pretentious --- no matter how it comes across, no one can argue when it comes to what won in the epic Blog vs. Studying battle.