I was at the Vietnam Trade Fair on 9 November, and the surge over the bridge that evening was quite a scene; hardly any effective crowd control and the bridge simply was too narrow and was not built to handle this sort of crowd.
So with a magnitude of several thousands raging over this bridge, something of this nature was likely to happen if it gets out of hand. And happen it did. Shortsightedness on the part of the planners and the architects. If there is yet another evacuation of sorts from Diamond Island over the two bridges in future, do expect more bodies.