10) It increases your drag.

9) Your wetsuit is already tight enough.

8) Because a guy could really get hurt if he had to drop his weight belt.

7) 1 pill to get you up, 20 pounds of lead to get you down.

6) Two words: fire coral.

5) You could accidentally penetrate a wreck.

4) You would constantly be searching for blowfish.

3) It increases your risk of entanglement.

2) Risk of "inappropriate" contact with the reef.

1) Divers aren't supposed to rise quickly.