Surfing 'Locos':
In Brazil, surfers are attracted to the Araguari river not only for it’s twice-daily tidal waves, but for what lies beneath those waves… Piranha! Thousands of the flesh-eating fish dwell beneath the water’s surface, ready to swallow up any unsuspecting bovine that should wade in for a dip, or surfer who should lose their footing. Apparently they’re trying to market it as a tourist attraction.