one time at a big rave my friend found a bag with a decent amount of mysterious white powder in it. we all had a little taste, but no one could identify it. my friend took it home and forgot about it until a couple weeks later when we'd all been up for a couple of days partying. again we all tasted it, and still couldn't figure out what it was. eventually another friend decided to guinea pig it, and railed a decent line of it. he immediately started cursing the burn, and his eye started to water. he said he didn't recognize the taste, and it burned like hell. few minutes passed and he wasn't feeling a thing. that's when another friend heroically grabbed the bag and flushed the contents, declaring it could be anything, someone could get hurt. when he came back from the bathroom, the friend who had snorted the powder suddenly said 'i think i'm going in to a k-hole' and spent the next hour comatose on the couch.