Heroin Idea's on what this "H" actually was?

[ShAYZoN]

I don't do heroin myself but I was reading a intresting "bad trip" report on smack and was curios to know what you guys thought this might of actually been. I'm not sure why I care but I am really intrested on your guys opinon's.

(Here is the report)- http://www.erowid.org/experiences/exp.php?ID=21151