Once I dropped an empty water bottle to the floor as I was waiting for the subway on the platform. Of course I ignored it. You know, who cares? It’s someone else’s job to pick that crap up. Then as I was leaving on the train, I could have sworn I saw this serious looking guy pick it up and put it inside some kind of ziploc bag. As I was staring in disbelief, I couldn’t do anything, the doors had closed and the train was leaving. It all happened so fast. He looked over at me and saw that I was staring, probably with huge eyes, and he turned his back at me and started walking away.
I swear I never dropped any other kind of litter to the ground anywhere ever, ever since.