THE CHAMBER
'(<a href="http://www.j-archive.com/media/2006-07-28_DJ_18.jpg" target="_blank">Cheryl of the Clue Crew shows us a hyperbaric chamber on Catalina Island, CA.</a>)  A <a href="http://www.j-archive.com/media/2006-07-28_DJ_18a.jpg" target="_blank">hyperbaric chamber</a> is also called this type of chamber, not because you relax, but because you return to normal pressure'
a decompression chamber