When they get there, Mark’s mom says it’s time to go. Jack gets out of the car, and the two look at each other. They both start to laugh and they high five.

It sounds like you have quite an interesting story unraveling. If you're planning to write it, here are a few recommendations and advice to further develop your plot: 1. Provide Background: Start by expanding the background details about Jack and Mark, their personalities, their lives, etc. Help the reader understand their environment, their families, and their motivations. This will increase the reader's investment in their fates. 2. Mystery and Suspense: Keep the readers in suspense. Initially, do not reveal the reason why the two boys switched clothes. It could, perhaps, be due to a mysterious incident or a magical event that happened the night they fell asleep, making them swap lives. As the story progresses, clues about why it happened could be slowly revealed. 3. Life Swap Challenges: After the swap, each of them could start facing challenges handling the other's life. For instance, Mark could struggle with the demands of the Jimmy John's job, while Jack could find difficulty in understanding Mark's lifestyle, his friends, and his family. 4. Lessons Learned: As the story progresses, both Jack and Mark could start learning from their swapped experiences, causing them to grow and appreciate each other's lives. This can help instill themes like empathy, understanding, and friendship in your story. 5. Path to Swap Back: The final part of your story could involve Jack and Mark trying to figure out how to swap back into their own bodies. This could involve a adventure and a further deepening of their friendship. 6. Conclusion: The story can wrap up with them successfully swapping back after facing different challenges and learning profound life lessons. Remember, the mark of a good story is how much the characters and their circumstances can resonate with your audience. Attempt to make Jack and Mark as believable and relatable as possible. Don't forget to sprinkle doses of humor, irony, or other elements to keep the narrative engaging. Good luck with your storytelling!