Random Acts of Kindness

Probably shared this story before...but I remember in my 2nd year of university I was selling this textbook for like $140 or something and I was meeting this dude at the mall. I met him and he gave me the money and left. These were the new bills when they first came out and I remember people always complained how they stuck to each other really easily. So I remember when I was counting it the dude gave me an extra $50...and I remember something in me just clicked and I didn't even hesitate, just called the dude and was like yeah yo you kinda gave me an extra $50 and he was so grateful and was like woooow really, thanks man. So I met him at school and gave him the money back. Like a year or so down the road, turns out we had a bunch of mutual friends, including one of my close friends and I met him again and now we're pretty cool even to this day. We always talk about it and he's always like yeah, after that day I told all of my friends cuz it was such a big thing to him I guess LOOOL...this isn't even to brag, to me it wasn't a big deal, it was a no brainer to give him back the money...but to him, it was like wow $50 is a lot of money and this dude could've kept it and didn't I guess...so yeah that was cool.