there was a kid in my 4th grade class that had ADHD hardcore. this kid was craaaaaaaaazy. never did his work always threw fits, always complaining and being obnoxious. one time the teacher walked out in the hall to talk to another teacher, and this kid got up, stood on top of the teachers desk, and told the class about this elaborate plan he had to kill the teacher, blow up the school, and run away. the class was in shock and as soon as the teacher walked in everyone squealed on him.