Context: I wan in vlass with my friend. I gave him a dollar as a joke for his pencil. I asked him to give it back and i gave him a new pencil plus his old one. He refused to give it back. I got mad at him and ttied to get the money back, but he would not give me it. After fighting about the dollar, it ripped. 
After it ripped, i got mad and walked away, as he walked around telling people about it, trying to look as cool as possible.

So, AITA for getting mad at him for ripping a dollar and making himself look cool from it?