Bill Bound: A Gravity Falls AU

Mabel's Sock Opera is coming to a close.
Mabel and Bipper fall down from the lights and onto the stage.
The crowd is utterly confused.
Bipper begins to chase Mabel around.
Growing exhausted, he collapsed. With the help of Mabel's tickles, he flings out.
Normally, this would be the part where just Dipper regains his body, right?
Wrong.
( NOT BILLDIP )