5-3 Mother with young

And then, suddenly Akoro threw off his backpack and ran away startled. I was familiar with this behaviour by now and suspected that he had bumped into an elephant. I cautiously crept in the direction of where I thought the elephant would be. Then I saw two large ears and a body protruding from the bushes. The rest were also approaching with their cameras. Then I saw that it was a mother with child. Which large tree must I choose if the mother was to charge me? How fast is an elephant?