I was crew on that...talk about a total non-event!!!! I didnt even realise we had started the take-off role and slowed down until the captain made the PA!!! You do realise that if there had been a full breaking of the aircraft at high speeds your camera may very well have become a missile in the cabin causing injury??? One of the reasons we say not to use and to safely stow away electronic devices during take off/landing!!!
Now try an emergency breaking on a 777 in KIN after a reaching a high speed! That was SCARY! And lets not mention a go-around in LHR sitting at the back of a 747-400!!!! Thats always fun!