Sleep deprivation.  When people can't get a decent nights sleep, they go crazy.  We're in the middle of nation wide riots and looting at the hands of a radical insurgency who is likely being aided by foreign adversaries like China.  Fireworks come from China by the container full. https://www.washingtonpost.com/graphics/2018/business/the-largest-supplier-of-american-fireworks-is-from-china/