I'm going to break my friends tv and refuse to buy a brand new replacement
Why would you break his TV?
Yes, he once teased me about my poor math skills.
You feel bad about him teasing you I can tell. Breaking his TV in return doesn't make it right, he will have proof you did that. Then he will take you to court to get it replaced, so control your urge to damage his property.
I was going to smash in his face but I dropped my bat.
I don't think you should resort to any sort of violence in this situation. Why not just tell him that he offended you and ask for an apology?