Google Trick - i'm feeling lucky button

Do you ever come across in your mind what is the button 'I'm feeling lucky' for? The button 'I'm feeling lucky' appear in the first page of Google search. I'm not going to explain what is the main purpose of the button, but I'm going to share with you some of the Google trick that related to the 'I'm feeling lucky' button which i found its quite interesting. I also not going to illustrate what the search outcome because i want you to try and experience it itself. The commands are simple. Just type the list that given below into the search bar and click 'I'm feeling lucky' button.

This is the list;

1. Google gravity
2. Google epic
3. Google mirror
4. Google sphere
5. Google rainbow
6. Google Pacman
7. Blackle
8. Google loco
9. Google pink / purple
10. Google space
11. Google underwater

Google pacman

Have fun!