Alex Freeman's stash

Seems like Fenrir knows a friend, Alex Freeman, who was attacked by mutants in the X-18 lab and had to hide his loot in a ventilation shaft above a corridor, along with a disk.
== Walkthrough ==
See the video below for the location of the stash.
== Notes ==
* Jumping out of your backpack for a higher altitude can be tricky, an alternative way could be to use three "Filth" artefacts for higher jumping.
* You can also use a Gravigun to pull an object below the ventilation shaft.
== Bugs ==