My 12 year old DS has very badly cut his leg, it happened earlier today when he was coming back into the house along with some of his friends, they jumped over the garden wall to get into the front garden and as my DS did it he caught his leg on a sharp piece of the wall, this has resulted in a deep cut which goes from the top of his thigh to halfway up his left buttock. It has been bleeding an awful lot and it is very painful. Should I take him to the hospital, try and get a doctor to him ? What should I do ?