You know when the Boss Battle Bell comes up. Well when you challenge the boss Jack goes URRRAAAAHHH and punches it like an insane person! Well you can do that in the game! You won't want to do this near a lot of enemies!

1. Find an enemy
2. Tap the "A" button as fast as you can
3. Jack will keep punching really fast but no kick after the 2nd punch if you're fast enough
4. If you're lucky he will do what he does at the Boss Bell kinda. Do a POWERFUL punching sending your enemy headless and anyone colliding with him to anywhere around!