Before catalytic convertors rendered CO asphxia in motor cars unfashionable, there was a persistent belief that this, as a method of suicide, took some little time execute - possibly as long as half an hour. The truth, however, is that it takes rather less than three minutes; perhaps you should direct the attention of your EMDC Supervisors to the excellent Wikipedia entry on the subject of CO poisoning! I'd recommend it to you as well! I wasn't there, so I'm not qualified to comment, however, I think that (given similar circumstances involving me) I'd have gone to A&E myself, and taken myself off the road until given a clean bill of health.