My friend Jackie and I were wandering around the University of Chicago campus late on a Saturday night, and we came across this guy (his name is Robert) playing his euphonium on the quad. We stopped to talk, and he said he took requests. I was trying to think of a euphonium-friendly song, and Jackie said "Single Ladies!" Surprisingly, even though Robert said he had only heard the song once or twice, he was able to do it very well!
(Apologies for the dark video ... it was night and my point-and-shoot camera can only do so much.)