Watch Green Day's full set from last night's iHeartRadio Music Festival in the replies. It ends with the band's set being cut short and frontman Billie Joe Armstrong going on an F-bomb-filled diatribe before smashing his guitar.
In their defense, from what I gather, the festival was running late (reportedly because Usher went over his allotted time) and their set time was cut in half. I assume they knew going on that it was going to be abridged, but maybe not how much.