Christchurch Hospital Chimney

During the June 13th 6.4 earthquake, when we got two large ones in quick succession in one afternoon, I was in my car, at the cordon fence, driving down St Asaph St towards the hospital.  One of the main things that worried me after I checked a parapet wasn't going to crash down on us all, was the violent sideways swaying of the hospital chimney further ahead down the road... belching out smoke