Death by sexual misadventure?

One of the guys at work recently told me that if you blow a lungful of air into a vagina, the resulting air bubble would enter the cervix and spread elsewhere, causing a massive, painful, deadly embolism.

TRUE???

I believe this was mentioned in The Joy Of Sex; it’s possible, but unlikely. Definitely contraindicated if the woman is pregnant.

More info:
http://www.goaskalice.columbia.edu/1859.html

Cecil has covered this one. http://www.straightdope.com/classics/a2_210.html