[wes]

Has anyone experimented with freediving on pure O2. I was taught in my SCUBA course it was (could be) toxic below 10 meters. This I assume is with the diver continuously breathing oxygen. I was wondering if any trials have been done with only taking one breath of O2 on surface and then freediving? I also realize this is potentially very very dangerous to try and greatly appreciate a the DB forum where we can talk about these things!!

Cheers Wes