Remember David Cronenberg's trippy classic Videodrome? In that brilliantly demented film, anyone exposed to the Videodrome TV signal began to experience bizarre, horrific hallucinations, which distorted viewers' perception of reality and eventually killed them.
I'm not saying the clip below will do the same thing to your brain... let's just say I can't guarantee your safety if you decide to press Play.
According to I Fucking Love Science (whose stories have been pretty horrific lately), this animation has been precisely designed to trigger more than just a standard optical illusion; if you follow the instructions to the letter, the patterns will stimulate your brain in such a way that it will expect them to continue... long after you've stopped looking at them.
The full effect is best created by watching the HD version on a compatible hi-res monitor. They warn that the strange sensations may continue for a couple minutes, but are otherwise harmless (so they say). The only noted risk is for those susceptible to light-triggered seizures.
With that in mind, press Play and fire up the All-Seeing Eye of Doom... you have nothing to lose but your sanity!