Some VERY good singers appear in a mall and invite shoppers to conduct them (I hope a donation was involved). Some of the conductors are quite accomplished themselves; others are jerks; and others just have fun or are amazed.
What is most fun, though, is how the singers did such a marvelous job responding to the "conductors", especially as they try to follow the baton as it is waved by children.
[Update] It seems that the embedded version of the video plays havoc with some tablets, so here is the link. It is from a CBC video, which has an unfortunately long intro ad.