A Gallery of Awesome Optical Illusions

This is what happens when you don't wear your retainer, kids. 

Li Wei is an artist based in Beijing, China who specializes in gravity-defying art projects. Wei does not enhance his photos with graphics programs, rather he constructs situations using mirrors, metal wires, scaffolding and acrobats. 

One of these guys is commercial chalk artist Julian Beever, the other is one of Beever's popular 3D chalk sidewalk drawings. You can see more of his art here.

You better bring a pretty large bag to clean up on a walk with this dog.

"Does this contact look cloudy?"

Carpooling with Tony Hawk is totally extreme dudes.

Behold, the rare two-headed zebra. 

Touch screen 2.0.

No hallway that long should be without a moving walkway.

It's all fun and games until he lifts his leg to pee.

That's a lot of effort to go through just to play "Chopsticks."

Check mate.

If you walk through this hallway you wind up on the other end of the space-time continuum and the universe folds onto itself. 

Just to be clear: when mom asks for a high school portrait, this is not what she wants.

This train is fine until rush hour kicks in. 

They had to dispose of Kirstie Alley's violin somewhere.

"The bathroom is down the stairs and to the left."

Why save a baby from being devoured by a lobster when you can just snap a picture of it instead? See more of chalk artist Julian Beever's work here.

"I think I found the leak!"

"Little help, please? This thing is getting heavier."

Spinal Tap's set pieces continue to be put to good use.

Don't you hate it when someone else wears the same outfits as you?

Some people never outgrow their toy cars.

Can you tell which one is real?

Look long enough and your head will start to hurt from trying to figure out how many buildings are in this picture.