Barbara sat on the toilet trying to pee, but found it difficult due to a kidney stone.
That’s it. No supernatural monster lurked in her bladder, no plant monster waiting outside the door to devour her, no crystal croc swimming in the toilet water.
It wasn’t even that painful. ‘Twas mostly just waiting for it to pass. Not a dire stone; just your average inconvenient kind.
It finally passed, allowing her to finish & leave.
Her day went perfectly smoothly after that. Truly. No car ran her over as any last-minute deux ex machina, no realization o’ the horror that is her existence.
She did find a quarter on the ground; but that’s all.