Aight, so I have seen some weird things on the addons I have (smiling dead corpses, blood on new rooms on Nester), but nothing has creeped me out as much as this one. Idk if the creator decided to make a troll or something, but after killing like 16 npcs in the bunker, I saw something run in one of the corners (no, not one of my npcs; I killed them all, and I had ai ignore player on). The shadow looked like the burnt corpse, and the running animation was that of a hgrunt soldier running from half life 1.

Once again is this a easter egg or something?