Status-Q

I’m a big fierce bird.

No, really, I am!

You think I’m only small, but I’m going to be big and fierce one day.

Are you scared yet?

See – I’m practising already.

There, that’s a pretty fierce look!

Found this in the past, somewhere out there on the net...

Look at the dot in the centre and move your head towards or away from the image - the surrounding circles seem to move.

Anyone know why? Could you use such effects to make advertisements, or road-safety signs, more noticeable?