My sister just had her third baby yesterday. The little bugger was born by caesarian after flipping to breech during the labour. Sher had a scan the day before so she knows that he was cephalic then. She says there was an Alien moment straight after her waters went, and his heartrate went all over the place, and then they found that he'd gone and flipped to breech. So EMCS for her.
It turns out that he has a 37cm head. We wonder if that might have been a reason? Apparently no moulding on his head although she'd been in early labour for several days.
Anybody else had this happen to them?