“Sink or swim” was not a particularly relevant idiom for Nelson the narcoleptic turtle. He floated, and good thing, too, or he’d probably fall asleep, sink, and die. Instead he just bobbed along on the surface, snoring softly.
One day Nelson floated ashore and fell asleep there.
Narcolepsy is boring.
This story is based on a title suggested by @Vanguard1219.