Which detail from in another country by Ernest Hemingway is an example of understatement?

My knee did not bend and the leg dropped straight from the knee to the ankle without a calf, and the machine was to bend the knee and make it move as riding a tricycle. But it did not bend yet, and instead the machine lurched when it came to the bending part. The doctor said: "That will all pass. You are a fortunate young man. You will play football again like a champion."

Explanation: sorry its that not right, its all i know

what do you need

explanation:

i don't understand

"the tune the he might never know again." this part build anticipation. dexter got extremely happy by the piano tune. he could see what he was living at that moment in his life throught this feeling. the reader might want to learn more about his happy life. in fact, he called it a state of   'ecstasy'. the fact that he had got in a mood of intense appreciation and that everything about him was extremely bright and glamorous might lead the reader to feel that this state of happiness may not last long. the two parts from the excerpt that exemplify the anticipation are: " the sound of the "; " it was a know again."