It has become a tradition for Brazilian fans to sing the second verse of their national anthem a cappella after FIFA cuts off the music before World Cup games.
It happened before Tuesday's Brazil-Mexico game, and it completely overwhelmed Neymar - the 22-year-old who's the face of this World Cup.
He was in tears as the anthem reached a climax:
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The camera cut to the crowd, revealing an incredible scene:
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When it cut back, Neymar was trying to pull himself together:
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This is all you need to know about how much the 2014 World Cup means to these players.