A joke is not a thing but a process, a trick you play on the listener's mind. You start him off toward a plausible goal, and then by a sudden twist you land him nowhere at all or just where he didn't expect to go.
“It's appropriate to celebrate public service, and the thoughtful people who choose to serve. They symbolize what is good and decent about this historic citizen legislature, and we thank them.”
“I loved that about her because I knew it would open the door for a lot of comedy, because I knew that the conflict would come, because not many people live like the way she does.”