As I looked through this year's commencement speeches, I came across this delightful opener. Hamid Mir addresses the graduates of the Kennedy School at Harvard and begins by asking everyone to get up and stretch. It's a simple, but brilliant idea that instantly raises the level of energy in the room.
At the end of his speech, Mir gets the audience on their feet again - this time for a standing ovation. While clearly the audience appreciates the speech itself, I believe that his opening stretch made it more likely for the audience to stand up at the end.