Have you ever wondered how people create photographs of drops of water splashing up from the surface, or a bubble caught in a moment of time?  If you have you should really take a look at this entry in to a digital photography competition which takes you through the process one step at a time.  The results are unbelievable!  Click on the pic to see the whole thing.
Tribute to James Cameron's "The abyss" - How'd They Do That?