Wait... What?

Today, we will be looking at a very "deceiving" illusion. This illusion may look like something, but don't be fooled. Honestly prompt yourself to guess what this is. If you are confident you think you know what this is, check here.
This illusion tricks you into thinking it is one thing, when it happens to be another. Why is this? Well, your mind collects about 80% of information you receive from sight. With that fact in mind, we can conclude that by seeing something that has certain characteristics of something else, we get the notion that it is what we think it to be, because we are thought to have seen it before.

Here's another interesting illusion. It's simply a very misplaced shadow, and carries the distinguishing features of a face. Very, very weird. What's even more misleading is just how realistic it looks, when in actuality it's just a tree's shadow, and only a tree's shadow. I find it to serve a sense of "creepiness". What do you guys think?