Oxymorons

I am bored and I decided to compile a quick list of oxymorons.  An oxymoron is a combination of words that contradict each other. I made this list up in 5 minutes.  I even impressed myself...

1. act naturally

2. virtual reality

3. living dead

4. jumbo shrimp

5. pretty ugly

6. original copy

7. old news

8. rolling stop

9. constant variable

10. clever fool

11. paid volunteers

12. only choice

13. sound of silence

14. exact estimate

15. civil war

Like I said, I was bored at work!