This is a nice exploit when you need mana really fast and you are out of combat. When you go trick or treating at any inn in WoW they will sometimes give you candy such as candy corn or lolipops. The candy corn or lolipop regens 3% of your mana every second. the lolipop or candy corn stacks with water making insanely fast mana regen!!
Notes:
I have only tried this with mage water.
The candy corn or lolipops do NOT stack with food.
the bobbing apples do NOT stack with food.