Foaming inside a watermelon is not something to ignore. It’s a sign that the fruit is actively breaking down and may contain harmful microbes. Even if some sections appear normal, once fermentation begins, the entire watermelon is unsafe. When it comes to food safety, it’s always better to throw it out than risk getting sick.
Watermelon
You’ve just read, If You Open a Watermelon and See This. Why not read Manager Had To Hire A New Employee.