This is why you should ALWAYS have a trip sitter around who can intervene when things go bad.

Trip sitters are not just necessary for beginners, when people are used to taking psychedelics it's a known tendency to underestimate the risks and think "things always went smoothly so nothing will happen, no worries" I've had an old friend impulsively attempt suicide on LSD after years of frequent usage. Never underestimate the risks, always have someone around.