A student suicide at Indidana University this spring brought to light a growing trend (particularly in east Asia) of suicide using hydrogen sulfide. This is a mix of common household chemicals which, when mixed and inhaled, cause an immediate reaction and a quick death. This powerpoint presentation was given to us by our risk management office to give us a brief overview of this issue.
Something else interesting about this form of suicide: the victim's have a tendency to leave notice for the first responders so they are not injured. In the IU case, the student left a note immediately seen upon room entry warning the first reponsders of the presence of hydrogen sulfide.