[quote

ost_uid0="SSJKarma"]example:
i came uppon a web site, on th emain page there was two rings with a dot in the center, it was writen look at the dot without leaving it don't look at the rings then move your towards the screen and back to its original position !
guess what hapenned ?
the rings kinda started to move depending on the way i was moving my head.
as i looked at the rings themselves, they just stopped rotating and i kinda freaked out as to see how such an optical effect could be made ![/quote]
Just noticed, bar to what karma previously said in this thread..