All the clichés in the book
With all the fun and excitement, there's a lot of pressure on the bride and groom when they're the center of attention at the wedding. You're making sure you're paying attention to the words being read, and when it's your turn, you try not to repeat something nonsensical or trip up on your vows. Or, you're intently focusing on saying the right name because you learned from good old Ross Gellar.
However, this poor guy proves you always have your vows written down. It doesn't pay to go off script or leave them in the bathroom. At least promising to take out the trash is better than clichés other people put in their vows. Have to give the guy some credit. At least he did his best at the moment.