Edward Gorey did an unforgettable one of these 2-sentence creepers, as one of his excellent limericks:
"Each night Father fills me with dread,
As he sits at the foot of my bed.
I'd not mind that he speaks
In gibbers and squeaks,
But for seventeen years he's been dead."
And another one of his:
"The babe, with a cry brief and dismal,
Fell into the water baptismal.
Ere they'd gathered its plight,
It had sunk out of sight,
For the depth of the font was abysmal."