my complicated, mature idea that i'm waiting to write goes as follows:
super slow SAW type situation. maybe... SAW: Generations.
two strangers who don't get along wake to find themselves in a cell with one locked door, and two holes they can JUST not fit through. One, a round hole in the floor to shit in... and a narrow rectangle hole in the base of a wall...
with a KEY!!!!!
a chain runs tight against the floor from the rectangle into their cell and down the shithole...
hint, there's also a Teddy Bear
After several months shitting in a hole (that drops off into a cell below) and eating whatever comes daily attached to the slow chain (when they don't miss it and it goes into the shit hole)...
they realize they have to procreate. They need to make a child small enough to fetch the key in the adjacent cell.
Three years pass in this terrible cell. They teach their new child to crawl into the rectangular passage and fetch the key.
It picks up the key... and to their horror the infant is stomped to death by men in boots they never knew existed.
Several years later their new child is trained to be quick, sneaky. He slowly works his way through the hole... peeks in... then snatches the key and comes back!
They use the key on the door only to find (to their horror) a smaller door!! Locked! BUT there's also a child's arm-size hole.
Down the hole is a .... piece of paper. The kid reaches and snatches it. EASY! Then, deeper in the hole... a KEY!
But first, they read the IKEA style instructions. It shows a child reaching for the key only to have his arm cut off. It also shows them feeding the child into the poop hole (the pool of shit below) dangling from a chain.
Months pass. They just... don't know what to do...
finally they decide they must try. and they put poor timmy's arm into the hole for the key. BE QUICK TIMMY.
quick as a FOX!! What's a fox? You'll see timmy, you'll see!!
nope. cuts his arm off. they have nothing to stop the bleeding.
so they follow the Ikea instructions. Maybe... just maybe... their bleeding boy will find help somewhere in the shit hole.
They drop him down.
And listen to him until he passes out in the vat of shit.
A small note comes with their next meal.
IKEA INSTRUCTIONS indicate that a boy with no arms can't possibly dangle from the chain in order to get to safety.
so... they make more babies...