Flashmob of the Day: A flashmob invaded a Copenhagen, Denmark Metro train last month, but in this case, the flashmob was the Copenhagen Philharmonic Orchestra.

They treated unsuspecting commuters to a performance of Grieg’s “Peer Gynt,” and creative agency Makropol captured the whole thing on video.

Right about now, a few people on that train are probably wishing they had taken their earbuds out.

[22words.]