That is such an interesting thought. I wish I could answer it, but I never really gave it much thought before. It did ring a bell in my head while I was reading your post, that my husband and I often look at each other when we walk into an empty place that quickly becomes crowded and say to each other "Wow! it's a good thing we got here when we did or we'd be at the end of that line."I know it's happened recently. Funny. I'll have to pay better attention to this.