On the November 15th episode of SBS's 'Strong Heart', SNSD members Taeyeon, Yoona, Yuri, and Tiffany made guest-appearances along with Seo Kyung Suk, Song Chae Hwan, Son Ho Young, Kim Ji Hyun, Lee Hongki, Jin Sae Yeon, Fujita Sayuri, and Lee Byung Jin. During the talking segment on the show, Yoona revealed, "My blood type is B, and we are known to lose our cool sometimes". She began, "Just like the incident with Jessica's stalker, there was once a time when a fan was waiting for me in front of our dormitory. He got inside before the door could close, and he ran up the stairs when I stepped onto the elevator." But instead of taking the elevator up, the suspicious Yoona decided to go up the stairs. She stared at the fan straight in the face before finally losing her cool and calling him over to scold him. "Excuse me, do you live here? You're not allowed to be on these premises!", she yelled to the fan. She continued, "However, after getting to know him more, he was actually a really nice guy so we sent him off nicely", revealing that Type-B's don't stay mad for long. Yoona also shared a story about how her pants tore during a performance at the Tokyo Dome in Japan, earning her a new embarrassing nickname. Source & Image: TVReport via Nate