Flakka is just the latest in a long line of stimulant drugs that can, in some very rare cases, result in astonishing public behavior. Such as running nude through the streets to escape "unknown people trying to kill him". Such as trying to kick in the door of a police station to get IN so as to escape cars that were supposedly chasing him. Such as trying to shoot oneself on a rooftop, naked. Such as trying to have carnal relations with a tree after proclaiming oneself to be Thor.