Need as not sure if answer is right, hope someone can

What does water came out from a rock mean in this poem and why is it compared to the radio waltz? time was away and somewhere else. the waiter did not come, the clock forgot them and the radio waltz came out like water from a rock: time was away and somewhere else.

Our coach’s idea of food for the entire wrestling team was tiny sandwiches and fruit.

What attitude of the aristocracy is illustrated by lady bracknell's lines in the play?