Stare at the dot in the center and move your head in and out

Woman Behind a Man (Press CTRL+A)(you can find a women behind a man in explorer only)

If you look around in the neighboring figure you will notice the appearance and disappearance of black dots at the crossings.Even though this figure looks similar to the Hermann-Grid, it is markedly more vivid. Furthermore, the effect is probably caused by different mechanisms than those causing the Hermann-Grid effect.1993: First demonstrated by JR Bergen at the ARVO, in a weaker variant1994: Re-discovered by Bernd Lingelbach’s wife Elke1995: Demonstrated at the Tübingen ECVP meeting (Schrauf M, Lingelbach B, Lingelbach E & Wist ER. The Hermann grid and the scintillation effect. Perception 24: suppl, 88–89)1997: Schrauf M, Lingelbach B & Wist E. The scintillating grid illusion. Vision Res 37:1033–1038, 2001: Invoked to explain Florida’s election problems (“Count the black dots, recount to confirm…” ;-)
Question: Do the streets or the squares influence the colour of the apparent disks?As you notice in the neighbouring figure, red streets leave the disks black. But if the squares are red (move mouse over figure), the disks acquire a reddish tint...

Can you spot the numbers of legs that this Elephant has?