There's a monster on my breakfast!

Perhaps my vast rate of Muller Corner conspumtion has angered the Muller Men, and they have sent a soldier to stop me from eating my breakfast today.

Or perhaps not. This is an excelent example of Augmented Reality, where a computer generated image (the monster) is overlayed onto a live video feed from a webcam.
The computer knows where to put the monster because of the black and white glyph I placed onto my yoghurt. You can even turn the glyph around, and the monster turns around too.

Oh well, at least the Muller men haven't going to get me yet!