Probably something to the effect of "look at that stupid freaking tico, he can't even get off a corner. Ai! Good one! Got him in the ear. Ai! Another one! Stupid ticos should stick to their mamas' skirts, this is a man's game"
A friend who has gone to Azteca for several US/Mexico games says that the place is absolutely harrowing for visiting fans. And god help you if you are a woman and need to go out into the concourse for a biobreak.