Link wasn't unfamiliar with the idea of multiple dimensions. He was starting to believe the idea that this hospital was a completely different world from his home, or Midna's.

"...More or less. Her means of getting to my world opened the way for the person who threatened it in the first place. So she destroyed the portal on her way back." Link's voice was quiet. He looked up to Sora.

"Have you had a similar experience?"