Anyone know how to achieve this, unfortunately files not included :(

Hi all, does anyone know how I can achieve this effect, unfortuntely the include file has not been supplied in the download.

I am after the bounce effect upwards, no scale but the bounce.

I have looked at the physics, but frankly find it far to hard to narrrow it all down.

Thanks for any tips or help

http://www.ffiles.com/view_listing.php?sid=151&cat=4