We get crickets in our walls sometimes. Or I'm going insane. Last year, there was this one in the wall by my room. All night long, that fricking thing would chirp. Drove me nuts for about a week before I pounded the wall in frustration... and the damn thing moved down two feet. So I pounded again. And it moved another two feet. Eventually got it out of my walls. Success! It came back off and on throughout the fall. Or different ones. Not like I care. But I'd pound, and they'd go away.

...late last week, I woke up to a cricket noise in another wall. *cries*

Unless it's not a cricket or an insect of some kind, and I'm just insane. That's also possible. O.o;