Britney Spears seemed shaken amid a terrifying occurrence on Wednesday night (Aug. 9) when a man surged the phase amid one of her Piece of Me residency appears in Las Vegas. A fan-recorded video demonstrates a unidentified individual running onto the phase as Spears was playing out her hit "(You Drive Me) Crazy" and instantly being handled by security.

Standing 15 or so yards from the spot where the man surged the stage, Spears at first appears to be unconscious of what is happening, shouting to the group "would you say you are folks having a ton of fun?" But she rapidly realizes that something is off as three security monitors encompass her and she asks "is something alright? What's happening?"