Tim Ferris, author of ‘The 4 Hour Workweek’ and body-hack master, met up with David Blaine for a breath holding teaching session. Initially Tim was only able to hold his breath for 40 seconds, but after some advice from David Blaine he was able to up that time to 3 minutes and 33 seconds. Quite impressive stuff.

You can read all about Tim’s experience on his blog which I highly recommend.