You should always be respectful of others.
Paul is in an elevator and the door begins to close when he hears James yell to hold the door.
Paul wants to react to James' request.
Paul quickly presses the door open button to make sure the door stays open for James.
Paul quickly presses the door close button to make sure the door closes before James can enter.
James is thankful to Paul for having manners and for being such a nice guy.
James is annoyed that now he has to wait for another elevator and waste his time.