Seo In Guk gave the 90 degree bow even to his fans.

One scene during Seo In Guk's birthday fan meeting was captured, catching much attention. Seo In Guk sang "All For You" with 2 fans and gave the 90 degree to the fans who were walking down the stage.

Internet users who saw this commented, "Is the 90 degree bow Seo In Guk's trademark?"

Photo Credit: Online Community