I dreamt this last night.
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INT. A SWIMMING POOL. DAY.
A SWIMMING INSTRUCTOR IS LEADING A CLASS COMPRISED OF A DOZEN SEVEN-YEAR-OLDS AND A HORSE.
THE HORSE IS STANDING AT THE EDGE OF THE POOL.
INSTRUCTOR:
Come on. Don't be scared.
HORSE:
I don't want to! You can't make me!
INSTRUCTOR:
I keep telling you, it's a swimming lesson, you don't have to drink anything.
HORSE:
Leave me alone! I'm not thirsty!
END