 Armstrong then gave [[the finger]], and declared that Green Day would be back before throwing his microphone down and walking off the stage.Two days later, the band's representative apologized for the incident on the group's behalf stating that "Green Day would like everyone to know that their set was not cut short by Clear Channel and to apologize to those they offended at the iHeartRadio Festival in Las Vegas" also adding that Armstrong will be headed to [[Drug rehabilitation|rehab]], for abuse of alcohol and prescription pills.However, Dirnt would later say in an interview with "[[Rolling Stone]]" that he agreed with what Armstrong meant by his rant.