It chose to destroy itself rather than live with us.

Related:

• Lisa: I can feel an evil presence in this house. Marge:
  Evil!? Homer: Quiet, Lisa. You're scaring your mother...
• Hm... Life with the Simpsons. What choice do I have?
  [self-destructs] -- The House, "Bad Dream House"...
• Bitchin'! -- Bart watches the house self-destruct,
  "Bad Dream House" in "Treehouse of...
• Lisa: It's an ancient Indian burial ground... Bart:
  Man, this place has got everything! -- "Bad Dream...
• House: They are all against you, Bart... You must kill them all.
  They all must die... Bart: Are you my conscience?...
• House: Geeettt ooouuuttt... Marge: What on earth was that?
  Homer: Probably just the house settling. -- The Simpsons...
• Bart: Do it again! House: What? Bart: Make the walls bleed.
  House: No! Bart: Hey, man, we own you. Let's see...
• Quit throwing your garbage into our dimension. --
  A message from the beyond, "Bad Dream House" in...
• Prime location, eighteen bedrooms, moat... -- Marge admires the family's new mansion,
  "Bad Dream House" in "Treehouse of...