- last post: 01.01.0001 12:00 AM PDT
...because the Covenant are psychotically driven to kill the parasitic humans before they spread. First they shot the sign to get past it. It didn't fall but they can't let the human slip away... Now they are presented with two options, go under the sign or go over the sign. The covenant, filled with bloodlush don't think and follow the Chief as closely as they can.
These are aliens, psychotic aliens in a holy war that don't value their own lives. They are not calm rational humans.