You never know what will happen when you see Green Day and tonight was no exception. About 20 minutes into their set, the band was ushered offstage and abruptly stopped playing. Video boards said the show was 'paused' and to stay tuned for details. After 10 minutes, the band returned and put on a great show. Billboard is reporting an unauthorized drone was the reason for the stoppage. It certainly had fans in attendance wondering what was happening?