I love a challenge - here goes:

Seven tourists wearing t-shirts that said King Family Reunion crowded around the strange little diorama of the room they were standing in, in the middle of the parlor in the Lizzie Borden Bed & Breakfast. A tiny clown doll with a hatchet sticking out of his head lay on a tiny floor that looked just like the floor beneath their feet.

A voice came over the loudspeaker, announcing, This murder will occur in one minute. Behind them the door slammed shut and they heard the sound of a locking mechanism slide into place.

The clown who’d stopped by for a tour on his lunch hour looked nervous.