1. Anamorphic Illusions

This video will show you several anamorphic illusions. That means that you'll be seeing an image that looks like it's 3D, even though it's actually just printed on a piece of paper. It's all about the way that the camera is angled and how the picture was drawn. Illusions like this will make you question everything you see, because they're just so convincing.

2. Ear Illusions

Illusions aren't only meant for your eyes. There are some for your ears, too! Haven't you ever sworn that you heard someone say something, but they refused to admit it. It might've been because your ears were tricking you. We can't always trust our senses.

3. T-Rex Illusion

If you love dinosaurs, then you'll think this is the cutest illusion in all of existence. It will show you a t-rex made out of paper that looks like it's following you as you move around the room. There's nothing more adorable than these little fellows, so get ready to squeal.

4. Shade Illusion

If you're still confused over the yellow/gold or blue/black dress controversy that we all heard about a few months ago, this illusion should help you understand why we were all so argumentative. The way our brains perceive color is extremely interesting. This video doesn't look all that fascinating at first, but once a woman comes in to show you that what you were looking at isn't what it seemed, you'll be thrilled.

5. Balls Illusion

We all know that whatever goes up must come down. That's just the way that gravity works. However, when you watch this illusion, you'll wonder if that's true, because you'll see balls go up a ramp and never come down. It's hard to comprehend until you see the explanation at the end of the video.

6. Street Art Illusions

There are people who go out on the street and use chalk in order to create optical illusions. Even though you'll actually be walking on flat ground, it will look like you're standing on the edge of a waterfall or walking across a bridge. These illusions take talent, so they deserve more attention than they've been getting.

7. Draw in 3D

This video doesn't just show you an awesome optical illusion. It also shows you how to create an optical illusion. Instead of drawing in 2D like everyone else you know, now you can try drawing something that looks like it's popping off of the page. There's no better party trick than that!

8. Crazy Cube Illusion

When you look at this room from a certain angle, it'll look like there's a cube floating in midair. However, when you get closer, you'll see that there's really just a few lines painted on the wall. It's no wonder why magicians can pull off so many cool tricks when things like this exist.

9. Halloucinogetic Illusions

Don't watch this video if you're unable to look at flashing images. It's going to show you several letters placed inside of a circle that moves around and flashes. After watching the entire video with your eyes in the same spot, you should experience hallucinations when you look around your room. The walls and floor will look like they're moving--but don't worry, because the effects will only last for a few seconds.

These optical illusions are perfect to show your friends. What's the coolest optical illusion that you've ever seen?