Performance Freediving International
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Performance Freediving International (PFI) is a business established by Kirk Krack. It runs a freediving school and does promotional work. A central part of PFI is PFI Team with members: Mandy-Rae Cruickshank, Kirk Krack and Brett LeMaster. The goal of PFI Team is record breaking and education.
On March 1, 2007, Martin Štěpánek resigned from his position at PFI to pursue an independent career.
Cruickshank and Krack trained David Blaine for his appearance on The Oprah Winfrey Show in which he stayed underwater for 17 minutes. PFI Team was responsible for the education and training of David Blaine as well as his safety during the whole event acting as support divers. As David ran into problems with his stunt PFI Team members reacted and pulled him out of the sphere.
- Allen, Greg. "Risky Sport of Free Diving Making a Bigger Splash", NPR, June 21, 2008.