W
My mom once told me that when she was in junior high (as they called it back in days of yore) her English Literature teacher read "The Telltale Heart" to the students. He dimmed the classroom lights, and read by the light of a very small desk lamp on his podium. He had a practiced cadence and a captivating delivery, and the atmosphere was made more tense by the ticking of a small clock which he had placed inside the podium. He activated the clock while the reading was already in progress. Perfectly timed, he yelled the line about "it is the beating of his cursed heart" and the clock's alarm went off.
Several of the students screamed... and my mom's best friend peed herself.