This video features a few interesting examples of the ever-popular optical illusion. It’s hard to comprehend that sometimes we can’t believe everything we see with our own two eyes, but this video proves just how easily our eyes can be fooled.

The guy starts this clip out standing in a box, but at the end we discover that the box is not really a box at all. There’s a bending pole that doesn’t really bend, and a boiling sky scene.

By the end of this video, you might begin to doubt everything you see. If not, check out this natural hallucinogenic effect video.