Not enough coffee yet to think of saddest but I’ll go with this to start:
Walking to work as a grown adult, age 29, I saw a group of 5th grade kids surrounding a 3rd grade kid and beating him up, tossing him around, kicking on the ground by railroad tracks..
The saddest thing about this is that I didn’t look directly. I didn’t stop. I kept walking.
The saddest thing is how I justified it to myself. (‘you’ll only make it worse for him later if you intervene now’)
The saddest thing is: I believe I’d do it differently if I was in the same position now, but I know that I don’t know if I wouldn’t do the same thing again, which was doing nothing.