First - Take a few pictures. The pictures in this example have been taken overlapping each other from left to right. (Note: Pictures below have been resized).:
Then - Create a single large image out of these pictures, clean it up (background, unwanted people, etc.) (Note: Picture below has been resized):
And finally - Create a Flash-animation to show a vivid animation for a web-page (Note: Animation slows down or pauses where attention should be paid to, and speeds up for less interesting portions):