Because he heard it was the latest trend in the pond for a "hoppy" beauty sleep! Now, when he puts on his Sad Frog Eye Mask, he doesn't just hide his eyes – he hides from all the drama in the froggy world. The other frogs are starting to envy him, wondering if the secret to happiness is just a stylish eye mask away. Maybe Sad Frog is onto something, or maybe he's just ribbit-ing up the fashion game!