MSG NIGHT 2 – Someone threw their cell phone on stage and Biebs took a selfie with it. Everyone then proceeded to throw their phones on stage & Justin pretend kicks and tosses them.
Source:
http://computersphonesforbusiness.earn-cash-make-money.net/2012/12/31/silly-fans-throwing-phones-on-stage-and-justin-bieber-sings-rack-city-msg-believe-tour/