Long Fall Boot

"Gentlemen, I give you the Long Fall Boot. Think of it as foot-based suit of armor for the Portal Device. I'm not gonna lie to you, it's expensive as hell. But check this out: we told this Test Subject to just go ahead and try to land on her head. Heh heh! She can't do it! Good work, boots."

- Cave Johnson

The Long Fall Boot is a boot used by Aperture Science to prevent Test Subjects from inadvertently damaging the Portal Device while falling to their death. It does this by lessening the impact from falls, thus also preventing injury to test subjects.

Overview
During the testing of the Portal Device, the observers came across a reproducible human error - due to the conservation of the momentum of an object (or human) traveling through a portal, Test Subjects would reach great heights, only to fall and die on impact with the Test Chamber Floor, most likely due to damage to internal organs or because of massive blood loss. As Test Subjects were prone to flail uncontrollably when faced with their imminent demise, they would often drop the Portal Device, which would be damaged upon hitting the ground. The equipment was expensive, and was costing Aperture Science time, money and manpower, so Cave Johnson devised the Long Fall Boot as a solution to the problem of falls from height leading to broken equipment, by way of canceling out the momentum conserved between portals. The Long Fall Boot is a new iteration of Aperture's Advanced Knee Replacement for Portal 2. It may have possibly been A prototype of Chell's Heel Springs in Portal. The curved metal prong on the boot bears resemblence to a carbon-fiber synthetic foot replacement.

Trivia

 * The Long Fall Boot may be installed with a gyroscopic mechanism of some kind, as the boots aid the test subject in balance and keep them from landing on their heads when falling through or exiting portals. This feature is mentioned by Cave Johnson and demonstrated by Chell in |Aperture Investment Opportunity #4: "Boots".


 * When a test subject wearing the boots falls from a height that would require the boots to kick in, lest the owner be injured, they will make a sound similar to hydraulics moving.


 * They are capable of surviving truly long falls, at least four kilometers

List of appearances

 * PotatoFoolsDay ARG
 * Portal 2