It wasn't going well for him that day. Bad news was still whirling in his mind. He had lost countless rounds of poker, and how had a splitting headache. He goes to the counter and orders a drink. He downs several more before leaving the filthy place.

He shambles off to the train station, and squeezes to the seat vacated by an old indian man. He folds his arms like every one else around him and promptly falls asleep.

Worst mistake of his life.

As he dozes, several people enter and exit the carriage. Several people who potentially could have caused a marked change to his entire life.

A long lost friend enters. This friend is down on his luck too, probably even worse than our protagonist here. Friend sulks in one corner and shuffles out after two stops. Had our hero been awake, they would have noticed each others presence. They would have hugged and would have become business partners. Success would await them.

A charming and attractive lady walks in but takes no notice of him. Had he been awake their eyes would have met across the car, they would have gone out and spent many happy hours together, they would have realised that they were perfect with each other, and lived blissfully ever after together.

He then goes home, collapses on the couch with a beer in hand, and watches some Arsenal vs Liverpool before passing out. His half-finished beer spills over his couch which will leave a sticky mark until he throws it out several years later.

Every moment, a thousand thousand opportunities arise. Most of them flit by because one is at the wrong place at the wrong time. The rest are lost due to circumstances beyond one's control. The pitiful few left are not seen or taken advantage of and go on to become vestiges in the deepest reaches of one's mind where they will cause squirmingly-painful hindsight for years.