The Answers Revealed

I ask a lot of questions, so it's only fair that I throw out some answers as well.
1. Yes.
2. B
3. Only once, but with medical supervision
4. True, in most cases
5. Train B reaches Boston first
6. 42
7. Guilty by reason of sanity
8. Keith Olbermann
9. "The Brain That Wouldn't/Couldn't Die"
10. Yes, "Tormato"
11. The geologist slaps him on the back and says, "It's San Andreas' Fault!"
12. Cedric Diggory
13. Jennifer Aniston, but only if she promised not to tell my wife
14. D, C, B, A
15. The red pill
16. The Arizona Diamondbacks, in seven games
17. Boxers
18. 1,598 in 17 hours, 5 minutes, 25 seconds
19. The cheesemakers
20. To the left

Hope this clears everything up.