When Brazilian energy planners proposed to choke the Amazon’s Tapajós River and its tributaries with dozens of large hydroelectric dams, they underrated a formidable foe: the Munduruku people. The largest indigenous group in the Tapajós Basin, the Munduruku are proving to be sophisticated adversaries who are throwing a wrench in the dam industry's plans. The tribe has frequently caught the Brazilian government off guard with their tactics. They have a flair for the theatrical – they staged a series of dramatic protests in Brasilia, including a “die-in” at the Ministry of Mines and Energy – and the practical. In January, they delivered a protocol to government officials demanding a culturally-appropriate process of free, prior and informed consultation and consent (FPIC). While enshrined in Brazil’s constitution and integral to ILO Convention 169, the indigenous right to FPIC has been systematically ignored in Brazil.