This literally happened about 15 minutes ago. I was walking behind this lady pushing a pram with a kid inside playing with a helium balloon.
I suddenly see her baby accidentally let go of his balloon so I instantly turn on my hero-mode and extend my hand to grab the balloon string.
It was a really epic and glorious moment and in my mind I was already playing out how cool I looked and how the lady would thank me for saving the balloon.
Unfortunately, I did not manage to grab it in time. I did however end up with my hand in a closed fist straight into another man's cheek who was walking next to me.
Now there's a crying baby in front of me and a very shocked, confused and upset stranger beside me.
I think after the initial shock he did realise I was only trying to do a good deed so he didn't say anything to me but either way I immediately slowed down in embarrassment and let
them walk ahead of me...I am the hero this city does not need.
TL;DR Tried to save a baby's balloon from flying away but ended up punching a stranger in the face.