Clown sightings most common at 11pm and near Walmart says Twitter data

Coulrophobia, the fear of clowns, seems to be at an all-time high, as sightings of malevolent jesters seem to be springing up across the world – if isolated local and social media reports are to be believed.
Professional clowns have taken a severe PR hit, with some US police forces encouraging the public not to dress as clowns for their own safety.
It would be reasonable to assume that the incidents at least resemble a covert attempt at creating a viral marketing campaign for a movie