While at the Mara River in Tanzania to see the wildebeest migration crossing, we observed a large group of wildebeest amassing along the edge of a 25-foot cliff. The numbers continued to build and finally reached a point where the wildebeest in the front row decided to cross, despite the drop. Then in succession, the rest of the wildebeest followed off the cliff and on to the river, with many being injured in the process. The whole event was awe-striking to watch to say the least.