Memory #202

While taking a high school exam, the room was silent except for the hums of an unknown student. It was distracting to hear someone going, "Hmm. Hmm," every few seconds. Half an hour into the test, a girl named Alex yelled, "WHO is making that noise! Stop it! MMMM! MMMM! MMM!" She made the hummer out to be a retard, and the noise finally ceased.