The vast majority of pilots prefer to stay with the plane they are
flying... but there are times when separation is not only
necessary, it is needed immediately. Enter the ejection seat.
"It comes out looking like a gossip column, I'm sure.
But the point is to identify characteristics that will make
expeditions successful."
Source: NASA astronaut Sunita Williams, who
along with fellow Expedition 14 astronaut Michael Lopez-Alegria is
keeping a journal during her stay onboard the International Space
Station.