The phrase "jumped on one case" is an idiomatic expression used to describe when someone is solely focused on one issue or task, often to the exclusion of others. Antonyms for this phrase could include "multi-tasking," "diversifying," or "balancing priorities." To avoid tunnel vision and remain effective, it's important to spread our attention among multiple tasks and issues. Being flexible with our priorities, thinking outside the box, and delegating tasks to others can help us achieve more in the long run. Instead of jumping on one case, let's take a step back and assess the bigger picture to better prioritize our goals and tasks.