All of a sudden, an army of 3D dancing Dry Bones came out of the pipe!

And I was like:
"WHAAAAT?! Dry Bones won't be a character for another 3 years!!"
I knew I shouldn't have trusted that shady guy in the back alley.
I died later that night.

Having read a bunch of creepypastas i gotta say the best you can hope for is "Cliche but with a nice twist". I'd recommend the SCP Wiki. Very different format and technically not creepypasta but it's great at building atmosphere and has a consistent style.