It's frowned upon to fail to return a high-five.
Reese is walking up to the podium during high HS graduation ceremony, where his principal is standing with an arm raised for a high-five.
Reese wants to accept his diploma.
Reese high-fives his principal, does a little dance, and goes off stage with his diploma in hand.
Reese takes the diploma from his principal's hand and walks off the stage wordlessly.
The crowd laughs and cheers Reese on for his stage presence and silly behavior.
Reese's principal looks disappointed and the crowd thinks of Reese as impolite.