Spiders blamed after broken siren played creepy nursery rhymes randomly at night to UK townsfolk
Apparently a factory in the rural UK has a siren that plays an creepy nursery rhyme, a motion detector that activates the siren, and spiders large enough to trip the motion detector and prone to doing so in the middle of the night. This seems like something that calls for further exploration in a Creatures of the Night supplement. Or just a good excuse for a fright check while investigating an abandoned facility.