The Honourable David Peterson is a former Premier of Ontario. As the article states, he loves music, finds flashmobs neat... so guess what they did for him at his final Convocation? I've linked the article:
http://www.thestar.com/news/article/...-ceremony?bn=1
***David Peterson retires as chancellor of the University of Toronto, flash mob interrupts his final convocation ceremony***
then went to YouTube & found a better video of the surprise. I'm glad he enjoyed it. Looks like the people involved worked pretty hard to pull this off: