(1) Nope, you're correct. "Perfect storm" refers to a confluence of events combining at the same time to create an extreme outcome. Home run generally refers

(1) Nope, you're correct. "Perfect storm" refers to a confluence of events combining at the same time to create an extreme outcome. Home run generally refers to a singular event of great benefit, an analogy that derives from baseball. Your English is much better than you think, especially with grasping idioms. I've seen worse in HYP writing seminars.