Right before marionette finish off mabel, a mechanical lullaby is heard and its coming from the box that the boy gave earlier, it seems like the music has a temporary effect on marionette and as the music goes on, the marionette deactivate itself and turned limp, mabel sighed in relief and the question now is, who is the one playing the music box? Then the music died and the marionette once again stood up, and also started attacking her, but fortunately she manages to wind it up again and the marionette become limp again, so she finally found a way how to stop all of this for a short time, if the music dies then the marionette will rise and starts hunting down the victim, if the music plays then the marionette will stop and shut itself down, so since mabel is the only one in the room, she guess that she's going to wind up the music box until dipper arrives.
-2 hours later-
Dipper finally got back and found her winding up the music box, "Isn't it that the box that kid gave to us?" Dipper asked, "Yeah and i finally knew what is it for" mabel said happily, "Okay then what is it?" Dipper asked, then she stopped playing it and the marionette secretly snuck up behind him and about to attempt to back stab him by one of dippers' sharpest pencils, "nope" mabel said to the marionette, then she started winding it up again and once again, the marionette shut itself down.
"Its amazing, but isn't that tiring?" Dipper asked, "You got a point, i cant wind it up like this forever" mabel said in a lazy matter, "Dont worry, starting tomorrow we'll put it back where it really belongs." Dipper suggests, she find it a good idea and now her arm is tired and now dipper has to do it.