I'm going to shove my sister down a hill
That would really hurt her. Why are you planning on doing that?
Yes, I'm pissed off about it.
Sisters can be annoying but shoving her off a hill is wrong. She could get hurt or die.
Whatever... I'm going to do it.
You may end up regretting it and paying severely for your actions just because you were angry at your sister. If you can't resolve something calmly and peacefully with her, then you can just ignore her or move away from her instead of committing criminal acts.