[magick-users] Warp effect

[Josh]

I'd like to achieve this effect.
http://www.bigstockphoto.com/photo/view/2345862

In Photoshop, I use the warp tool to drag the Top-Center and
Bottom-Center toward the Center of my image.

To achieve the bottom reflection portion of above photo, I drag the
Top-Center and Bottom-Center away from the Center of my image.
(matching the amount of pull with the previous pinch).

I can almost get what I want using -distort Bilinear
http://www.imagemagick.org/Usage/distorts/#bilinear

Any ideas?

Thanks,
Josh