Musico-Syncracies

Rating: NSS
The first time it happened was in college. I was visiting a friend's room and the TV was on but muted; music was playing on the sound system (I don't recall if it was radio, CD, or other). Then it happened--the television show went to commercial and the music playing happened to synchronize. The song and the commercial fit together quite well, and those of us in the room happened to notice. The one commercial ended and the next began, but the music still fit. The commercial was an airline commercial. As the song came to an end, a person in the commercial struck the cymbals dramatically above his/her head. We all laughed at how seamless the picture and music had been.
This incident has happened again more than once. It's been in mostly restaurants where there are televisions on and background music. It hasn't been as dramatic as that day in the dorms, until today.
I was in a restaurant today when a Diet Coke commerical came on. The music fit so unbelievably well that if I hadn't known in advance that it was background music, I would not have known it was not the music for the commerical.
It has me wondering: is this merely a coincidence when it happens, or is it that there is something about pop culture that makes visual/auditory fit together well, or is it that we have been conditioned by the media culture where our mind automatically makes the connection for us? It is just something that makes me go hmmm. . .