Death by stampede?

Finally we faced Magtheridon. A creature so powerful that 5 channelers were required in order to banish it. While we were busy discussing about what to do when engaging Magtheridon, someone from the raid accidentally disturbed one of the channelers holding him. As a result, all 5 channelers started attacking us and the gates suddenly closed. All hell broke loose as everyone started dashing towards the closed gates... One by one the raid members fell, bodies piling up by the gate. After the dust had settled, what remained were corpses lined up, an eerily familiar scene resulted from the image that I saw that night...