Read the following excerpt from a fictional story:
"As the sky darkened and the rain began to pour, John stepped out in his brightly colored Hawaiian shirt, a huge smile on his face. 'Perfect weather for a beach party!' he exclaimed, completely ignoring the storm brewing above. He grabbed his surfboard with enthusiasm and headed toward the coastline, oblivious to the warning signs that read: 'Danger: High Winds.'"
Which of the following statements best describes the use of irony in this excerpt?