NEW : Flipping off America during halftime ca n't be a good career move , '' Will Ripley of Denver tweeted . Rapper M.I.A . was `` nervous and not thinking , '' a source says . " The rapper had been in the studio with her producer at the time of the shooting but left before police arrived to investigate. The NFL says the gesture was inappropriate and disappointing . The halftime show generated 8,000 tweets per second .
NEW : Rapper M.I.A . was `` nervous and not thinking , '' a source says . " The rapper had been in the studio with her producer at the time of the shooting but left before police arrived to investigate. The NFL says the gesture was inappropriate and disappointing . The halftime show generated 8,000 tweets per second .