A very long time ago I saw a picture like this and finally I did it myself.
It's so much fun to do, so I just HAD to share it.
THINGS CAN GET WET!
Pick a glass, a big glass.
Fill it with water or any other liquid.
Pick something heavier than water. Should be easy...
Set up your camera, use the the continuous shooting mode.
Shutterspeed must be very high, so the water is 'frozen'.
Once you've focussed enough, get someone to trow the object into the glass.
Your job: KEEP ON SHOOTING!
There's always 1 picture good enough to publish :)