I once took a general education class that was considered by some to be an "easy A." (For the record I took it because I was actually interested in the subject. No, really.)
Anyway, the professor got wind of this and of course decided to make the course a little more challenging. So on the mid-term the students (in general) were upset at the surprising level of difficulty. Rather than the simple regurgitation of basic concepts that had been tested in previous years, the professor asked questions that probed for a deeper level of understanding of the material
In the class after everyone got their marks back one student stood up and quite vocally complained that the mid-term exam tested our understanding of the material. Most of the class, just sat there in stunned silence.