I'll try this.
A while back I was planning my trip to Japan and looking for the cheapest day to fly there. I ended up with a day that wasn't ideal, but it worked so I picked that day. Because of that my trip overlapped with that of another person going to Japan (for the same reason I was, a friend's wedding) and we actually were on the same plane together, although we didn't know this at the time. She was quite lost when she got there and I was able to help her out and because of that I sort of ended up being her guide for a few days while I was there. On one particular day I was helping her and some other people she knew get around, but there were some communications problems and they disappeared for most of a day (when it was only supposed to be a few hours). Because of that I had to wait for them (to make sure they hadn't died or anything) and didn't have time to figure out that the place I intended to do my last minute shopping was closed that day and so I didn't have time to go to another store (which was further away, plus I was more tired than I expected to be). In the end I did accomplish my shopping goals... but from America, and paying import prices. Because of that I ended up spending more money and had fewer options.
I could have flown on a different day and had a more independent trip. Probably I would have spent more money that way, bought more things, maybe spent more than would be good for me, but enjoyed it nonetheless. I would likely not have this lingering distaste for the people who got lost, but I also wouldn't have this amusing-in-hindsight anecdote to share and wouldn't be able to think of anything to write in this reply. I might even have decided to book my flight another day and lost any chance of getting a good flight and not gone at all and that would have completely changed a whole bunch of things, not the least of which is my wardrobe.