Performance Freediving International (PFI) is a freediving training agency founded in 2000 by Kirk Krack. Krack coached World Champion Freedivers, Mandy-Rae Cruickshank and Martin Stepanek. PFI teaches freediving clinics around the world and is involved in both team and athlete development. Since 2004, PFI has hosted DejaBlue, which is an international freediving competition. In July 2019, PFI was purchased by International Training, the owner of companies including Scuba Diving International and Technical Diving International. Promotional work In 2008, 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. Cruickshank and Krack have also worked with Tiger Woods. Training PFI offers the following courses. Diver courses Snorkeler Introduction to Freediving Safe Buddy Freediver Immediate Freediver Advanced Freediver Safety Freediver Professional courses Freediver Supervisor Assistant Freediver Instructor Freediver Instructor Assistant Immediate Freediver Instructor Immediate Freediver Instructor See also References External links PerformanceFreediving.com PFI Underwater diving training organizations