You talk about this 'brace,brace' stuff. We had a little incident on a 727 years ago, nothing serious, but an 'emergency' landing was needed. We were doing fine, until at 200ft, every single pax (+-150) started screaming "BRACE.BRACE, KEEP YOUR HEADS DOWN" in time with the cabin crews chant. At that late stage of the game we flippen sh@t ourselves, missed the altitude callouts........well that was my excuse for the landing anyway.