Round 3, Question 8 answer

A complicated ritual, the key part of which involves bringing the right hand from the right ear to in front of the mouth, then moving the bunched fingers of it back and forth across the mouth, whilst half-whistling half-blowing on them, and then making a big motion with the same hand, and pointing to the sky, with a look of triumph. For full marks, the last action should be accompanied by a sort of "Shhhwrrrrring!" noise.