At Grimmauld Place

Harry Potter is the chosen one to save the wizarding world against Lord Voldemort

Harry: Does pinchers with his hands

Hagrid: thinks Harry is on drugs

Hermione and Ron and Hagrid and the order of the Phoenix all look at Harry but pretend to not notice it

Harry: Continues to do pinchers with his hands

Harry makes weird squeaking noises as he is doing pinchers with his hands