In “The 3-Second Rule,” the speaker shares how a lesson learned on the tennis court and skatepark became a life tool for courage. By acting within three seconds—before fear and doubt take over—she’s learned to face challenges, make friends, and seize opportunities. Through lively stories and humor, the talk reminds us that bravery isn’t the absence of fear—it’s action taken just fast enough to beat it. As a dynamic member of the post-2010 generation, Serena Teng carries the perseverance she’s learned on the sports field into every part of her life. She believes that physical health builds confidence, and that sports such as tennis and rock climbing develop not only strength and endurance but also the courage to make bold decisions. Known for her warm energy and ability to connect with others, Serena quickly builds trust even in unfamiliar settings. Through her talk, she hopes to inspire young people to act with greater confidence, initiative, and determination. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx