Bulma and Oolong in “Unfinished Business”

Those Saiyans aren't here on vacation you know? They wanna take over our planet and sell it. It'll be the end of the world as we know it.

Oolong

Uh...oh, no! Please, I don't want it to end. Uh...oh, I can't take it. Why did you have to go and tell me that Bulma, you know that I'm highly allergic to danger.

You mean that you're a coward.

Oolong

Uh, it's a medical condition.

Right, your selfishness produces a chemical in your brain that causes extreme fear.