Duolingo Lesson Complete Head Explode Animation

Upon completing a lesson with zero mistakes, the screen transitions to show the mascot Duo sliding up. Duo's head expands, turns red, and explodes into a stylized mushroom cloud with sparks. As the smoke clears, Duo is revealed with a pink brain exposed. Below, three stat cards slide up and fade in with a staggered sequence, featuring counting numbers (tickers) and playful sound effects to celebrate the user's achievement.