1. If you see it right away, you're really good at this.
Here's a clue: look at the heads above the girl's computer screen.
2. He looks pretty tough.
Like, really tough. Good job, guy.
3. Try not to get freaked out by this one.
Hint: look over her head.
4. Well, this one doesn't seem so bad...wait.
Yeah, that's going to leave a mark.
5. This one's a classic.
It's not what you think. Look harder.