What was the worst or most inappropriate sermon you ever heard?

I'm Presbyterian. Our minister is pretty good, and is always there for the congregation, but sometimes he hits a clinker. About a year ago, he spent most of the sermon breaking down the lyrics of "What A Fool Believes" by the Brothers. I'm not joking. We more or less got where he was getting at, but it was still weird, especially since our pastor is almost 70. Also, about 30 years ago, another minister in my old church titled a sermon "Star Wars and Star Wonder".