It's not okay to spit on another person.
James was bumped into at a party by a person that is not watching where they are going.
James wants to get the attention of the person that bumped into him.
James taps the shoulder of the person that bump into him and asks a question.
James spits on the person that bumped into him.
James is able to speak to the person that bumped into him.
James escalates the situation and gets into a physical fight.