TIL: I can be the villain quite easily and not know

Last night I was hanging out with some friends. One of them though, I did not get along with. He was a classic troll. I don't take too kindly to trolls. In response, I guess I put in him his place, but in a way that hurt. According to my friend, I hit pretty hard and mercilessly. Just goes to show that life isn't like 4chan. If you can dish it out, be prepared to take it as well, but without the filter of the internet. But there is still a lesson to be learned for myself and not a good one. I have the potential to be a very terrible person. Something I don't particularly like myself.