Rapper Kid Cudi passed out in the middle of a performance Saturday night at Chicago's North Coast Music Festival. While performing “Pursuit of Happiness,” Cudi started running around and interacting with the audience, but he suddenly fainted after signing a fan's album. Security guards were able to catch the rapper before he hit the ground and quickly got him off stage. Cudi said he passed out of a result of not eating before the performance, but appears to be recovering smoothly. “ll do a better and make sure to eat properly on show days :) scouts honor!,” he tweeted Saturday night. Cudi also apologized for frightening any fans. "If I scared anyone tonight I am so so sorry from the bottom of my heart," he tweeted.