I feel like I need to deliberately run into someone not paying attention
Why would you hurt this person all of a sudden?
It was an act of revenge against the person, he has hurt me many times in the past.
That is a mean thing for you to do. I understand he may of hurt you in the past, but you shouldn't attempt to injure other people. This could get you into a lot of trouble and he would still come out on top.
What, he deserves this for how he's been to me.
No matter what he did to you, this is not going to make it right. Injuring other people as a form of revenge is hateful and cruel. You are better than that.