Happi has finally finished building his Gumbly Horn and wants to put on a performance, but then Bounce breaks the spring that powers the horn.

Tink mistakes the sun reflecting off a discarded toilet seat as a special weapon.

Happi is teaching gumblecraft to try to instill its virtues into the other gumbles, but when the snikes destroy the dodge gumble pitch during the class, the gumbles blame Happi, who sets out to prove the worth of gumblecraft by using it to trap the snikes.