Do you ever get the feeling that perhaps you should have sat in the next carriage? Or left home three minutes earlier in order to catch the tram before that one to arrive where ever it is before you missed something.... I always wonder how many opportunities I have missed, or how many people I've not met simply because I was in the wrong place at the wrong time. I wonder if you can really get it right....get on the right metro carriage of the underground railway, on a line miles away from anywhere and happen to run into someone, witness something, feel something, save someone. The butterfly's wings...