Me, watching someone making a static array as a local variable inside a function, that gets called on every frame: "Please, for the sake of my sanity. Make it a global variable. It doesn't change, so don't create and destroy an entire array on every function call! This hurts physically!"

Espcially, that's from a tutorial for beginners and it wouldn't be any harder to understand if it were a global, instead of a local variable.

But this is just really bad practice.