You’ve heard of improv comedy, but how about improv classical composition?
Ben Folds, who is awesome and one of my favourite music people, was tasked with composing a brand new song for himself and the National Symphony Orchestra based on suggestions from the audience. Oh, and he had to do it in 10 minutes. This is what he came up with. It’s a little silly of course, but watching him put it all together and then have everyone actually play it is damn impressive.