The FLIP auto-capsizing research vessel
The FLIP floating instrument station is 300 feet long and takes 28 minutes to complete a controlled capsize, during which time the built-in furniture rotates along with the vessel and the crew hangs on for dear sweet life above the cold, unforgiving abyss below. All in the name of the science of testing sound waves underwater, dear friends. You may commence aghast chuckling... now.
[Via Pasta and Vinegar]