An unsuspecting crowd of patrons at the public library in Valladolid, Spain were treated to a flash mob some time in 2014. According to one of the YouTube comments, the song is "Wana Baraka," an African folk song.
You can see the look of surprise on many of the patrons' faces. After all, one usually expects it to be quiet at the library (except on the second floor of Yocum--talking is allowed). Watch the end of the video.
After the patrons applaud, the silence returns as everyone goes back to what they were originally doing, no doubt with a lighter spirit.
