Illusionary

So I thought it would be fun to walk through some optical illusions. It's pretty amazing the tricks our eyes will play on us. Without any further ado, here we go:

1) Let's start simple. Is this possible?
2) Now,
3) Okay, are the purple lines straight or bent?
4) Do you see gray areas in between the squares? Now where did they come from?
5) Next, you should see a man's face and also a word...
6) Now, if you take a look at the following picture, know it's not animated. Your eyes are making it move. To test this, stare at one spot for a couple seconds and everything will stop moving. Or look at the black center of each circle and it will stop moving. But move your eyes to the next black center and the previous will move after you take your eyes away from it.... Weird.
7) And finally,