You should always be dancing!
Back in 1976, my cousin and I were driving in my little yellow VW Dasher along the beach in Delaware and we switched the radio on to a local station. The Bee Gee’s song “You Should Be Dancing” was playing, but as both of us were interested in Heavy Rock more than we were Pop Music, we glanced at each other and tacitly agreed to find another song. I switched the car radio over to another station and the same Bee Gee’s song was playing there too. We kept trying other stations, hitting all six of the preset buttons and were amazed to discover that this same song was playing on all six stations! Quickly, to confirm this was actually happening, we went through all of the stations once again, and sure enough the song was playing and at a different part on each of the stations, before it shortly ended on one of them. After all of the stations stopped playing the popular tune, we went back and triple-checked to make sure that we didn’t have any of the preset buttons set to the same station, and we didn’t, which made us wonder how often such an event might occur, and we sensed that it was probably very rare, even for a hit single at the pinnacle of the Pop Charts.