Kid Cudi fainted Saturday night while performing his headlining set at the North Coast Music Festival in Union Park.

During one of his songs the rapper went into the photo pit. Fan video footage showed him interacting with fans in the photo pit when he started to fall back. He was then aided by security.

Cudi (real name: Scott Mescudi) then came back to the stage but exited, not to return, with about 10 minutes to go until his set should have concluded at 10 p.m. The festival publicist said it appeared later in the set that Cudi was motioning to his team that he wasn't feeling well.

Afterward he tweeted: "I'm OK." And: "If I scared anyone tonight I am so so sorry from the bottom of my heart," adding his thanks to security staff and vowing to"make sure to eat properly on show days."

The North Coast Music Festival continues through Sunday night.