When Folds performed at Virginia Tech in 2007, when he started to perform "Gracie" the someone "Woo-Hooed." He stopped the song and asked the crowd not to do so since it was a song that was very personal to him. After his warning someone would woo-hoo anyway, and when they did, Folds would stop the song and start back at the beginning. He restarted "Gracie" 11 times before he finally got through the complete song.
Meg - Virginia Beach, VA, for all above