It's rude to lash out at your guests.
Mark just graduated highschool.
Mark wants to have a graduation party at his house.
Mark has a good time and when its time to shut the party down he thanks everyone for coming and the party has ended.
Mark gets mad because a guest spilled a drink and starts yelling at everyone there to get out of his house.
Marks' guests had a good time at the party.
Mark's friends are disappointed in how he handled an accident and dont call him much.