0691
Within the Duolingo leaderboard, the user's avatar features a small blue 'add friend' badge. To encourage social connection, the badge periodically performs a playful nudge animation: it scales up with a springy bounce, wiggles slightly from side to side, and then scales back down to its resting state. This micro-interaction uses high-energy physics to draw the eye without disrupting the overall reading of the leaderboard.
