Ah, Whitgift School, 20 plus years ago you would get a Chinook beating the place up during careers week or whatever. Not sure what height it would have been but not very much at all - certainly a wake up for the neighbours! We could see them from our office.
(Don't know if they've still got them but Whitgift School used to have several wallabies in a pen which you could see from the top deck of a passing bus; grey Monday mornings were certainly brightened by seeing those bouncing around the grounds on yer way to work!)