Knowledge

A bit of knowledge on optical illusions. Or scroll down to see what you came for.

Inferior and Superior Mirages, and Fata Morgana

Disappearing trailer

Source/credit: powerbookguy

This disappearing trailer is so confusing. OP said it was just as confusing in real life as it is in the image. Until you see it from a different angle and know that the structure on top of the trailer is shaped like a triangle, and you are looking at the right side panel head on.