It is used for tuning
For decoration.
The head joint is the 2nd shortest piece of the flute with the hole.
Take the flute from him and whack him over the head with it. That should work :D
A flute has three parts: a head joint, body (middle), and foot joint.
a cap
Bottles have necks but no head, and wear a cap.
the body,head and tail
To cap a sprinkler head, you can use a sprinkler head cap or plug that fits the size of the sprinkler head. Simply twist or push the cap onto the sprinkler head to cover it and stop water flow. Make sure to turn off the water supply before capping the sprinkler head.
it has three the head-joint the main bit and the bottom
Sometimes if screws are loose, then they could vibrate when you play, blow on the flute. If the tuning cap isn't screwed on all the way, then that can vibrate when playing.
Top if cap to bottle and hat if a head cap
lions head makes them you can find answer to the lions head beer cap puzzles at www.lionsheadpuzzlecaps.com