playing with fluids and vorticity
 

we all play with fluids, and turbolence and vorticity and all the stuff.

but take a look at the true masters... :eek:

http://www.youtube.com/watch?v=wuVgXJ55G6Y

marvellous.:cool:

Ps sorry if it is old for you, but things like this remember me why i'm so fond of studing fluid dynamics, and I tought to share it with you guys. :D