Add a sentence to the following story that provides insight about the characters.
John and Maria were walking down a quiet street in the small town when a lightning bolt split the sky.
Both John and Maria jumped in unison and let out a yelp, revealing their shared fear of thunderstorms.
Complete the following task based on the instruction and optional input provided.### Instruction:
Add a sentence to the following story that provides insight about the characters.

### Input:
John and Maria were walking down a quiet street in the small town when a lightning bolt split the sky.

### Output:
Both John and Maria jumped in unison and let out a yelp, revealing their shared fear of thunderstorms.