Cudos to the FA in First who had to extend herself from her seat to keep the Cockpit door shut during take off .I was in 1B 10/2/07 CO 386 and saw the door swing open as we accelerated done the runway.. with a bit of metal.. flying off down the aisle The FA had the presence of mind and flexibility to stretch brace and keep the door shut until we leveled off enough for her to stand braced against the door ..A job well done:-: in protecting the Pilots.. Cheers Jane