Those poles only buckled whilst being taken down - they released the tension in the netting and then slowly took it down (as in releasing it all the way round, then coming back and dropping it!), as opposed to releasing the tension and swiftly dropping the damn stuff. Up until that point, the netting was holding on and was being reinforced at a couple of points - as a couple of people next to said, it looked as if the Millennium just gave up.