Rnz: Afternoons With Jesse Mulligan

Every Monday we invite an expert to take your questions on their subject. You can send them to 2101 or Afternoons@rnz.co.nz. Today we're discussing freediving. Freediving is diving underwater on a single breath of air. There's no tanks. No breathing apparatus. No bubbles. Just complete silence New Zealander William Trubridge is a freediving world champion, and the first person to dive deeper than 100 metres without changing his weighting or using fins. He joins Jesse to take your questions.