Subject: If the earth stopped moving suddenly, what would happen to flying objects?

I found the following question and answer in the archives:

Astronomy: What would happen if all the mass of
the earth stopped rotating
Q: Jonathan Baty, No grade entered.
A: James Steele Foerch

The answer stated that basically that everything on the surface would keep 
going at around 650 MPH.
But what would happen to an airplane, traveling at the usual cruising 
altitude of 35,000 feet at around 500 MPH? Would it matter if it was 
travelling east or west? Or even, what about birds?

Re: If the earth stopped moving suddenly, what would happen to flying objects?