On his WTF (at 34:00 into the podcast), Todd Glass called funny-then not funny-then funny again bits "Kevin Meaney funny." Here's why:
Glass then talks about how David Cross bet him $2,000 when they were on tour together. The bet? That Glass couldn't drag out his Sham-Wow bit, where he lists various uses for a rag, for two and a half minutes. When Glass did it, he says it went great.
They lost me and then they came back...There's a point where they're all thinking, "Yeah, we get the joke. We get it. It's up and down. And you're gonna keep doing it. And we're gonna laugh more. And we're not. We've been through our cycle."
And then if you do it, they go, "Alright." You break them down.
Some other rake bit suggestions in the comments of that post here last week.