Why Wildebeest Stampede - S2.E3

You see there was a time when Wildebeest didn't stampede. They used to stand on the plains and munch grass all day. But there were so many of them and they were eating so much grass that all the animals had to do something about it. Tortoise realized that the Wildebeest weren't the brightest animals in Tinga Tinga and they always did whatever the last beast said. So the animals decided to tell the Wildebeest that they were welcome to stay in Tinga Tinga, and they must never run! So what did the Wildebeest do? They ran and they ran and they ran! So that's why Wildebeest stampede!