It was unusual, but net net she wasn't going to die from some compressions, even if I had given it everything I had. I figure she did what she did - what if I had overestimated m'y wife's breathing or color, she would be without oxygen that much longer? The 911 operator is on the phone 7 miles away, better to get my wife to the floor etc.

It's interesting to think, nothing I did helped to save my wife's life in anyway, short of dialling 911. Either way, may the gods bless the 911 system too - when things calm down a little, they get a fruit basket or something in thanks as well.