The good thing was that Henry wasn't hearing things. The bad news, that thing was real and probably very close now.

Tilting his head to the sound of the scraping on the walls, an unnerving feeling of fear overcame him. Though Henry couldn't see what was there, he could guess, and his imagination was probably far worse than the monstrosity creeping about. Then again, your imagination was your worst enemy in this situation, especially considering how it was able to create physical manifestations that later came out to get you.

Worst of it, everyone saw the monster differently. But Henry didn't know that's how it worked, he just knew he needed to get as far away as possible. Or fight it. "I heard it too," Henry exclaims and looks around for something that could work as a weapon.