Private tutors, what was you worst student?

Sometimes I tutor elementary or high school kids math. But no interesting stories here. My friend had a kid whose parents hired her to be a math tutor, but turned out the kid was forcing her to write his homework while he watched tv. And casually throwing peanuts on her. She told his parents expecting they would scold him, but all hell broke loose, because they yelled at her that she's incompetent because she can't write a simple elementary school homework, and if she doesn't they won't pay her. She was unemployed and really needed the money so she did it. She quit as soon as she found another job.