Anyone else creep themselves out during development?

[Damascus]

I did it to myself when I put in a script that spawns a random enemy and random path so you never know where it's going to come from.

When I reached the area, it spawned downstairs and walked upstairs past me, so I hid from it until it passed. Then I went downstairs, and it was WAITING FOR ME. I ran like hell and waited for it to go upstairs again. To this day I still can't explain how it got back down there, and haven't been able to duplicate it. I can only assume it phased through the floor somehow.