I was a music student as a kid. Took piano lessons, played saxophone in the band, was a singer in the choir. In each of these musical endeavors, the metronome was involved. If you’re not familiar, or not a musician, a metronome is a device that makes a clicking sound at a regular beat, to make sure that everyone stays on time and the music progresses at the proper speed.
Every once in a while, some wisecracker would crank up the metronome to get the band playing at a ridiculously fast pace, prompting the music teacher to sprout a few bulging blood vessels in frustration. Of course, we all got a good chuckle.