On the picture I can see on the second plan little mountains, and bushes. At first plan I can see a young man jumping on the mountainboard. He is wearing Tshirt and special equipment for mountainboard jumpers.
I think that the kind of sport is exciting and dangerous, but young people like it.
Mountain board jumping is dangerous because doing it we can broke our bones. Young people doing it because it gets them more adrenalin and they can show off.