There may be many varieties of records, but I'd never heard of someone free diving to that kind of depth, usually they latch onto a kind of lift that drags them down, and all they have to do is hold on and not die (Which is hard enough, I'm not knocking it) this guy SWIMS down like a goddamn whale? He's not even grabbing onto the line to pull himself down.
Try holding your breath just sitting there in your chair, now imagine doing the same underwater while swimming strenuously against your own buoyancy. Holy crap.
Also swimming with fins is completely different to swimming without them, those things make you whoosh along a lot faster
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