I bought the single I Feel Fine by the Beatles in Cleobury one Saturday Dec 1964.
Back at the dorm only a mate and I were in after lunch. We played the single on my record player and thinking the feedback sounded like the feedback on the school tannoy, we took a line out to the dorm speaker and played the song through the speaker system so it would sound like an announcement, after which we escaped to the village!
Returning for tea at 6pm the staff were still pondering how it happened but apparently (according to our sources) concluded that the staff room mic had probably picked up a radio signal! No cane & we felt fine!