When progressives start dropping like flies I might experience a form of "excited delirium syndrome", sure hope the cops don't blow me away.
As for the cause it seems drug and/or alcohol interaction is likely, the one guy cited could have had his drink spiked by someone looking to roll him or he has some inherited condition that reached maturity and was triggered by alcohol. Anybody on street drugs is for sure playing roulette, people do not react the same to chemicals in the body, it's a fact the legal profession has profited from in courtrooms across the land with prescription and over-the-counter drugs for decades.