Big Troubles is an episode of Wabbit: A Looney Tunes Prod. It first aired 22 Oct 2015.
Bugs Bunny and Squeaks find a bottle of Grow Fastums fertilizer. Despite Bugs' warning, Squeaks uses it on a acorn which grows too big to eat, and an apple whose worm also grows to enormous size. After creating numerous other monstrosities, Bugs takes the bottle from him. Hitching a ride on a giant butterfly, they travel around the world and spray the entire planet so everything will be the same relative size again, but the bottle runs dry before they can spray themselves.