1. When an Olympian Spoke During the Priesthood Session
In 1985, Peter Vidmar, an Olympic Gold Medalist, addressed the brethren. This address was one of only a few instances that anyone outside of the general Church leadership spoke at general conference. Brother Vidmar spoke on keeping the standards of the church and how a little extra effort can make all the difference in the end.
2. When President Benson Had Someone Else Deliver His Talk
President Hinckley got up during the 1989 April Conference and gave President Benson's powerful rebuke against pride. President Hinckley opened the talk saying that President Benson felt more comfortable with someone else delivering the address than himself.
3. When David Archuleta Appeared in the MTC Choir
Photo from Mormon Soprano
Though only a brief appearance towards the end of the song, David Archuleta made a cameo during the April 2012 general conference in a heartfelt rendition of "Praise to the Man."
4. When President Monson Announced the Missionary Age Change
This stunned reaction mirrored many faces across the world when President Monson announced that young men could serve missions at 18 and young women at 19. This opened many doors for those anxious to go, but who had previously had to wait until the previous ages of 19 and 21 respectively. The announcement was made during the October 2012 conference.