Then chew on this:
Armstrong Labs Report (can't link directly to the PDF, click on Toxicity Reports at the bottom of the page)
This report was removed from an AF website in '97, and that particular site disappeared in '99 (going by the internet archive).
Venting R134a comes with a hefty fine and/or jail time (just like R12). In a little-known Armstrong Labs experiment, a subject was exposed to R134a for four and a half minutes before his pulse and blood pressure became nonexistant. Miraculously, he was revived (CPR I believe), and given pure...