Swans on Tea

Weird bookshelves
Paradoxymoron

You need to a flashplayer enabled browser to view this YouTube video

You need to a flashplayer enabled browser to view this YouTube video

8 Mind-Boggling Optical Illusions
Most involving apparent motion.

Missed Kicks Make Brain See Smaller Goal Post
The researchers used a small, adjustable replica of a goal post to test players’ perception before and after attempting 10 kicks. While standing in front of the real-life goal, participants were asked to adjust the width and height of the model to scale.
The players’ pre-performance estimations didn’t correlate [...]

Edge detection
You need to a flashplayer enabled browser to view this YouTube video

Pink, green
There is no spoon green dot. It’s an afterimage from seeing the pink.
Things to add — if you look away, you’ll see green afterimages. Also, if you stare at any of the pink dots for a while, they (or the rest) will still tend to disappear. When you stare at [...]

Clicky

Two-Stroke Apparent motion
The illusion contains two pattern frames depicting a moving image (hence two-stroke) which are displayed using a technique that creates an impression of continuous forward movement. Any two frames from a motion sequence can be used.

These Circles are Round

You need to a flashplayer enabled browser to view this YouTube video

1+1 = 3, power of illusion