Taken in tc_hydro.
This one is a really creepy clipping glitch I had in the past with ragdolls that had causes ragdolls to sink in the ground partially, creating pretty disturbing images.
Like this one. Seems like this dead Spy was not taken care of properly and had not been honored in his work ...
... thus leading to the conclusion that ghosts in TF2 and Zombies are nothing special because of these cases happening.
Remember, take care for your people`s corpses!
The not-so-creepy case of Graveyard Scout: [link]
TF2 -> Valve