Give an example sentence using the given adjective.
Astonishing
"It was an astonishing feat when the gymnast completed a quadruple backflip."
Complete the following task based on the instruction and optional input provided.### Instruction:
Give an example sentence using the given adjective.

### Input:
Astonishing

### Output:
"It was an astonishing feat when the gymnast completed a quadruple backflip."