Fake
That hole in the ground, it's just the terrain repeating, the terrain at the start of the level sinks in so the player can get underneath the Bedroom and find a secret area, that same terrain repeats on and on
Hm... If it was a repeat from the house then why does my eyes keep playing tricks on me when i see wierd things going by at the dark version (out fo bounds) of bedroom. They looked like U.F.Os only i don't know. I just needed help on that part.
I'm pretty sure it's your terrain and that blinking it does, if your eyes actually ARE playing tricks on you to see that, go see a doctor or something o_o
As for the terrain problem, upgrade your graphics card