Hmm, looks like the problem there exists with you and your friend and not with the drugs. If people aren't responsible and do not use things in moderation, then bad things like that, can happen. Hell, if yo wanna be stupid and OD on tylenol, you can become sicker than a dog. So my point it, the drugs aren't a problem, your maturity at the time is. Seeing and hearing stuff? Pick a better situation and mindframe to trip in. Get a trip sitter. Know your limit.