What is the definition of Hopefully Fumes?

"'Hopefully fumes' is like saying, 'I'm hoping the smokestack's got enough air to make a cup of joe without burning down the entire city!' It's the sweet, optimistic way of wishing something doesn't go wrong, but it's so serious it could make a blacksmith weep. Here's an unsettling example sentence: "Despite the sun setting on my dreams, I hopedfully fumes that my last sketch would still make the gallery owner smile."