Custom Animation allows some movement, but I think what you saw was an
animated GIF. There are certain kinds of pictures that have animation
built-in. Usually, these are a series of 3 or 4 pictures put together to
make a brief animation sequence. The Office clip-art has some of these
(supplemented by Clips Online), you can find animated GIFs all over the
Internet, and you can use tools to build them yourself.
--David
--
David M. Marcovitz, Ph.D.
Director of Graduate Programs in Educational Technology
Loyola College in Maryland
Author of _Powerful PowerPoint for Educators_
http://www.loyola.edu/education/PowerfulPowerPoint/