You’re a Monkey fighting against the Bloons. During Round 100 against the BAD, the Bloon Master Alchemist splashes the massive MOAB-class Bloon with a special Permashrink Potion, reducing the almighty airship into a tiny little bug that gets squished instantly. Some of it splashes onto you as well, though, shrinking you down to 1 inch tall.

B.M.A: “Oops. Uh… sorry, bud. No hard feelings?”