Stop following the mouse!?

OKAY.
so ive followed the mousefollow with inertia tutorial.
and it rocks.
but
i’m trying to do something just a TAD different.

instead of having the MC follow my mouse everywhere,
i’m trying to have it follow just on a vertical track.
now, thanks to voetsjoeba, i’ve figured out how to make it go
only up and down,
my second problem is

HOW DO I STOP IT A CERTAIN POINTS?
i want the MC to follow my mouse up to a certain point
and just stop.

anybody know how?
:sen:

anybody!?

haha get back to me please
:ne: