is usually natural shape. But in this situation there is a better move. is a mistake because it gives white the opportunity to live in the corner.
When white plays the jump, black would usually just play the cut (a tesuji)
Next black would continue with a throwin and push from the outside.
However there is a cutting point. As you can see in the main diagram, white should first push. This way white can gain liberties.
So, in the main diagram is not good shape. It is better to jump on the 2nd line. Although that looks a bit soft, it is a multi-purpose move, because white cannot longer live in the corner.