It seems you can't get away with anything during a football match these days, especially in international friendlies. But Arellano nearly got away with his embarrassing blunder - that is, until he bent over to fix his socks in the 90th minute.
While it hasn't been confirmed exactly what happened in relation to Arellano's shorts - speculation has been rife that he must have eaten something sinister the night before. Luckily Mexico managed to salvage a 1-1 draw with the Americans, who impressed during their first official outing under new manager Jurgen Klinsmann.