Teachers from another class

Its not cool when a instructors come from another class and try to give a assignment just because they are not happy with their class. Or at the same time don’t have a enough to do with their own class. But at the same time I just did it out of spite and to be a little smart ass even though it took less then a minute to do. But yet they don’t understand that we were already task by our instructor because this class of ours in pretty much self paced and we know what to do already. But what ever I’m over it!!