It moves, it moves!

I'm developing my site on the side and thus been looking up various CSS tips and tricks on the side.

In the midst of my search I came across this fantastic tutorial - CSS+Javascript power. Fancy menu.

That rollover effect is fascinating (a water bubble, dollop of rain, a pretty caterpillar or some snot?). Not making fun of the effect but thinking of all possibilities!

Must implement this somehow.

Source:
Devthought via CSS Globe