Horror movies have expanded over the decades to help prove that even the most innocent premise could be twisted in a way that turns it into something terrifying. Even children's toys can be turned into complete nightmare fuel, as the Child's Play franchise has proven. However, whether it's a psychological, supernatural or slasher style of horror, one image has always been the source of terror for many: clowns. While Pennywise has become the pinnacle of clown terror and Terrifier's Art the Clown showed how a clown would be as a slasher, one movie explored a darker aspect of the clowns in 2014's Clown.
Source：https://www.cbr.com/how-clown-used-best-horror-tropes/
