Silence. The four dark shapes sit brooding on their concrete fingers. As if from nowhere two coaches appear. Twenty little green figures begin to bundle out. Splitting into groups of five, they race towards the waiting bombers. From out of their hideyholes the ground crew step to meet them. A swift verbal exchange of hellos and the crews disappear inside. Anti-collision lights begin their dizzy spin. From under once quiet wings comes the growing roar of four APUs shrieking into life. A cacophony of whines join in as the PFCUs come on line. The ladder is bedded down, the entrance door closes