seasickness

one-liner

is first being so sick you are afraid you will die, and then being so sick you are afraid you won't die.

Seasickness: at first you are so sick you are afraid you will die, and then you are so sick you are afraid you won't die. Mark Twain

is a sickness whose surest cure is to sit under a tree.

A sure cure for seasickness is to sit under a tree.

 comes in two stages - in the first, one is afraid one is going to die, in the second, one is afraid one is not going to.

Seasickness comes in two stages - in the first, you're afraid you're going to die, in the second, you're afraid you're not going to.

Jumping into the sea is a certain cure for seasickness.

is a condition which is never helped by sherry, but always helped by port.

Seasickness is a condition which is never helped by sherry, but always helped by port.

is the only thing that can make a tourist look like his passport photograph.

Seasickness is the only thing that can make a tourist look like his passport photograph.