I thought you'd might like to see some unusual freediving pictures, a competition under ice:
http://pa.photoshelter.com/c/felixfeatures...000Ec2A8DfBADU/
I also recently did some freediving in a Navy tank:
http://pa.photoshelter.com/c/felixfeatures...000evPvqefhLWY/
Both events are described in greater detail on my blog:
http://felixfeatures.blogspot.com/
Cheers
Fredrik
This is insane!
Always great to see what folks do for fun. 
I agree 
While I enjoy icediving as well... but doing it without a drysuite or better jet, no suite at all?!?
Thats just sick 
Nice shots tough - thanks for sharing!