(13)Lions are possibly on the watch, saving energy as they wait for an opportunity for lunch. (14)Once the large group moves to the river, lions could attack, making the group running in a wild and uncontrolled way. (15)The mad rush would raise a dust cloud that blocks the view of the wildebeests nearby. (16)A kill is almost guaranteed.(17)Sitting on the riverbank, I noticed that a young wildebeest finally stepped ahead and drank while the fearful adults held back. (18)Soon, others began drinking. (19)But instead of lining up along the bank, taking turns, they gathered and pushed.