Cosmo Kramer: During the takeoff rotation phase once sight of the runway is obscured by the coming of the cockpit can you explain why it is better to stare at the blank sky and not bother to check the progression of the rotation attitude with a view to ensuring that a tail scrape attitude is not achieved until after lift off? This is a particular concern on 4 eng./ long bodied aircraft which do not "leap" off the ground like most twins.