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Vereran cave explorer Robbie Schmittner describes his closest brush with death in his 17 years of diving in the caves and sinkholes of the Yucatan. Shot 100% on the HERO4® camera from A very special thanks to: Robbie Schmittner, Toddy Waelde, Guillermo De Anda, Dante Garcia, Bil Phillips, Jim Coke, Jeff Clark, Gosia Pytel, Brian Wiederspan, Jeanna Edgerton, Adair Crow, Maria Noel Zisa, Marty O'Farrell Thank you to the Instituto Nacional de Anthropología e Historia (INAH) for the kind support in the creation and presentation of this project. INAH Researcher – Guillermo de Anda, Ph.D The Quintana Roo Speleological......