as her taxi screeched to a halt ( it is surprising how fast a taxi can go when you shove a fist full of notes on its dashboard ) she realised that she had to stop that gangway from being removed , so she clambered out of the taxi , stormed up to it and leapt onto the about to become airborne gangway , and started marching purposefully towards the top ( which was by now well and truly in the air ) .