>> dickerson: finally tonight, if you've ever doubted the power of music, steve hartman is about to make you a believer. here's tonight's "on the road." ♪ ♪ >> glor: they are some of the best classical musicians in the country. but at one recent performance by the handel and haydn society in boston, the most memorable moment didn't come from anyone on stage at symphony hall. it came from the audience. right at the very end of mozart's masonic funeral music. listen. >> wow! >> reporter: did you hear that? someone yelled "wow!" and it resonated, not just in this hall, but throughout the classical music community. it was just such a departure from typical audience protocol, which is why the president of the handel and haydn society was absolutely... thrilled. >> i was like, "that's fantastic!" >> reporter: this is david snead.