Well on makin there is hut that you cant get into, what you have to do is climb onto the box in front of the window and jump onto the frame along the side of the house. then you crouch and make your way over to the window not closet to you but a bit further and face away from it, then you stay crouched and walk backwards then you should lay down and still be going backwards untill you fall through the window.
dont do this on xbox live do it in a private match because you could get band.