Hanging Out
When you first look at this picture, it looks like a normal group of teenagers just casually leaning up against a wall. But then, when you take a second look, you see the dog that is just defying the laws of gravity.
That's because the kids are actually lying on the floor. If you look closely, you'll see that the girls are holding their hair so that gravity doesn't make them fall and the picture looks more realistic.
On The Edge
This picture looks like a terrifying scenario nobody would want to be in. It looks like the man probably fell off his bike and is now holding on to dear life and may fall into the abyss any second.
For this awesome optical illusion you have to find a dark tunnel that can create the impression of a high precipice that leads to the abyss. Then, just lay on the floor and hold your bike or another object to make it look even more realistic.
Falling
This one just looks like a horrible, unfortunate event of someone falling down some mountain or rock and their friend not being able to save them. But don't worry, these guys are just fine.
The guy that is "falling" is actually jumping up, while the other guy is actually laying down and creating the impression of being standing upright. The result is super cool!