The other is when a student held up his diploma, smiled widely, and his mom took his picture. His mom looked like she was bursting with pride and about to start crying.
When you teach, it's easy to get cynical. You deal the most with the bad students who cause problems. The better students often pass by unnoticed. At graduation, however, you see the successes. Happy students celebrating a genuine accomplishement no one can take from them.
Congratulations to the class of 2011!