You Were exploring a Large, Decrepit, abandoned Mansion... when you Swore you heard Noises Behind You...

"Tsk! Hehehehe! Hahaha! Heheh!"

When you turned around, Nothing was there, and the Noises Stopped

Then you turned Back around, and the Noises Start again.

"Heheheha! Tsk! Hehehe! Hahah!"

What and Why.