New toy I want

http://www.airbuddy.net/

$1270 and you'll have it by next summer. Go for it. 

There are cheaper and more exciting ways to get pulmonary barotrauma, and you can even get DAN insurance to cover the medical bills!

There are cheaper and more exciting ways to get pulmonary barotrauma, and you can even get DAN insurance to cover the medical bills!

Yeah if you're gonna use one of these or any hooka rig, you better take a scuba class to understand how dangerous it can be. 

Just freedive its still easier than this. What if it gets caught on a rock cuts or slips out of your mouth and up to surface you go.... and you get to the surface and go HUH! I just killed myself.

I was thinking I could use my CPAP machine on an inter tube after seeing how easy this is!

Just freedive its still easier than this. What if it gets caught on a rock cuts or slips out of your mouth and up to surface you go.... and you get to the surface and go HUH! I just killed myself.

I free dive quite a bit, this thing has a 25 foot range. Never had a scuba class so I don't understand the danger

Just freedive its still easier than this. What if it gets caught on a rock cuts or slips out of your mouth and up to surface you go.... and you get to the surface and go HUH! I just killed myself.

I free dive quite a bit, this thing has a 25 foot range. Never had a scuba class so I don't understand the danger

Essentially, when you breathe in air at depth you breathe it in at the pressure at depth.  If you take in and hold a breath at depth and then rise to the surface your lungs will expand and pop as the surrounding pressure of the water decreases.

I was thinking I could use my CPAP machine on an inter tube after seeing how easy this is!

I'd pay to see that!

This seems a little to dangerous, a lot of inexpirinced/ no expirinced divers could get themself real messed up.
   your better off just paying for an FII or pfi class, then you can go well over 40 feet and not blow your lungs apart when your battery runs out or something breaks
 It could be awsome in a super calm not kelpy place though, so basically useless in norcal, 
 I hate tanks because of the nightmare or gear that you have to worry about, i like going into caves and im super clumsy, hence why i freedive,
 id kill myself instantly with this thing but for that price your better off getting some nice carbon fins and learning how to dive 100 feet.

I was thinking I could use my CPAP machine on an inter tube after seeing how easy this is!

I was thinking the same thing! 

I free dive quite a bit, this thing has a 25 foot range. Never had a scuba class so I don't understand the danger

And therein lies the problem.
Great cartoon. Perfect explanation w/o any words.
Here's hopefully a simple explanation in over simplified terms.
Lets say at the surface a molecule of air is the size of a tennis ball. Your lungs will hold 8 tennis balls of air at the surface.
You take your breath of air at the surface (8 tennis balls) and as you descend the the pressure of the water squeezes those tennis balls into the size of BBs. Your lungs also get squeezed so they too will only hold those 8 BBs.
Now as you come to the surface and the pressure decreases those BBs expand back into tennis ball size and your lungs expand at the same rate and will still accommodate the 8 tennis balls.
You started with 8 and you ended with 8 and your lungs compressed and expanded the same as those 8 original molecules.
Now lets say you are breathing air 25 feet below the surface. Those molecules at the surface started out as tennis balls but by the time they reach you, because of the water pressure, they are BB size when you breathe them.
You inhale a full breath, as much as your lungs can take in, but you are inhaling BBs, not tennis balls.
Now instead of filling your lungs with 8 tennis balls you have filled your lungs with 256 BBs.
Here's where the danger resides. IF you hold your breath and swim to the surface each one of those BBs will expand to the size of a tennis ball as the water pressure decreases.
Remember earlier at the surface your lungs could only hold 8 tennis balls? What do you think will happen when those lungs try to hold 256 tennis balls? KABOOM! You're dead.
YOU MUST exhale the entire way up if you are not breathing. If you are breathing you need to slow down your assent. Stay just below one of your small to medium sized bubbles all the way up. This way the molecules you are exchanging are changing in accordance to the pressure around you.
I never understood how this works until I did my first free assent while SCUBA diving.
How the hell can I exhale all the way to the surface from 40 feet below?
Best way I can describe it is like the clown and the handkerchief trick. Like the handkerchiefs just keep coming and coming, so does the air you are exhaling. As those molecules expand they seem to pour out of your mouth non stop.
Bottom line: NEVER HOLD YOUR BREATH IF YOU GOT THAT BREATH FROM BELOW THE SURFACE! PERIOD!

What do you think will happen when those lungs try to hold 256 tennis balls? KABOOM! You're dead.

What a way to go... 

Here's another little visual:

The second problem is the tennis balls that have become bb's are also in your bloodstream. As you ascend, those become tennis balls as well, and you get an embolism, a bubble in your veins. Bubble goes to your brain and you get dain bramage and die... Or something. Oh yeah, the bends, full body agony. If you're lucky, and you won't be, there will be a barometric pressure tank nearby, and they can stick you into it until the bubble have gone back down, then sloooowwwwlllly bring the pressure back down. The problem is there are like two or so any where near the West Coast, and you're likely to be in line for one. Then you die.

 

Going to need a bigger descender