I know you all do this. Don't lie.
When I'm at home alone, and I hear noises in my house - I always have a secret escape plan that I can use just in case it really is someone actually breaking in to the house. Or if there's a fire, I have an escape all mapped out in my head.
Usually my plan involves running out the nearest window. So if someone comes through the front door, I run out the bathroom window. And if there's a fire, out the window. It's handy for living in a one story house.
It's silly though, because usually the noises are things like birds in the roof, or you know those creeks the house makes when its "settling"? yeah those. Or when the fridge returns on in teh middle of the night and makes the big brrrrrrrrph noise. Those things make me plan out my escape haha.
And I know everyone else has secret escape plans as well. What are yours?