The only part of the game that gets me every time I play is the part where the guy jumps out of the wall. What makes it unexpected every time is that he pops out at completely random times. Very effective jumpscare for a game that's less than 3MB.

that's one of the parts that gets me all the time. But unless you play with headphones, it is about 1/5 of scariness.
With headphones it is mandatory that I rate this game the scariest I have ever played, as I scarequit at floor 30...

Dem buildings stealin' our forums, man....

Buildings?
If you can classify SCP-087-B a building....
DUN DUN DUN DUN!