"SLAP THE NUTS!! (Bonus Game) - SiIvaGunner: King for a Day Tournament" is a high quality rip of "SLAP THE NUTS!! (Bonus Game)" from SiIvaGunner: King for a Day Tournament.
This is an arrangement of "FIGHTING KING (Main Theme)" in a style based on "Break the Targets" from Super Smash Bros. Melee, the music for the "Target Test" minigame. At the beginning of the rip, Hinchy announces, "Slap the nuts!", and a crowd can occasionally be heard chanting.
The rip's thumbnail shows a walnut with Wood Man's face, with a "Target Test" target painted onto it.