A detention in Joeschool is a very unpleasant event. You can get a detention for various reasons which you can see in the Joeschool Book of Conduct. In the detention, you have to sit in Joe's office for an hour while he watches the Pasture Channel. If you do anything to distract Joe in any way (that includes loud breathing), he shoots you. Usally, you'll be there with other students but there's no way to communicate. Really, you don't want to get detention.