Anti: "...?  I...I don't think I understand."
Gaster: "... it's only them.  They are the only ones who were there..."

Gabby and Annie appear to be in some sort of machine.  A human soul is in a separate container connected to the machine.
Gaster: "Okay... Beta.  Power it on."
Beta: "Yes sir."
The machine turns on.  Not long after, the power starts shorting out.
The two cats start screaming.
Gaster: "Beta!  Turn it off!!"
Beta: "I can't...!"
Gaster: "What do you mean?"
Beta: "The controls are jammed!"
A bright light glows from the soul.
Then, everything goes black.

A/N: o H b O i