With a new semester looming, freshmen, sophomores, and juniors at my high school had to register for classes. Before they could do that, however, students were divided into groups. Each group was to report to an assigned teacher, so (s)he could give us the course description books and allow us to fill out our schedule requests for the next term.
Without sounding mean or rude, Mr. K. began the course advisement session by shouting, "I HAVE THE COURSE DESCRIPTION BOOKS!!! I WILL PASS THEM OUT, AND WE WILL GO THROUGH THEM!!!"
"He doesn't sound angry," I thought, "but why is he speaking three times louder than he needs to?"
Then, it dawned on me. He was a typing teacher. Usually, when he spoke, he had to shout over 20 to 30 students banging on keys. Still, even during a session when no one was typing, his default speaking voice still rivaled Billy Mays pitching Orange Glo.
I got to hear that bellow the next year, when I took his class. He never sounded cross, but I often thought, "I doubt any fast food drive-through worker ever complained about not being able to hear his order."