PORTO ALEGRE, BRAZIL – JUNE 25: Lionel Messi of Argentina celebrates scoring his team’s second goal and his second of the game during the 2014 FIFA World Cup Brazil Group F match between Nigeria and Argentina at Estadio Beira-Rio on June 25, 2014 in Porto Alegre, Brazil. (Photo by Ian Walton/Getty Images)
Fan issues in Pittsburgh.
Not enough information, really.
Who is going to stop him?