Wish I could take credit for thinking this up, but I found it elsewhere online and cannot:
I was walking across a bridge one day, and I saw a man standing on the edge, 
about to jump off.  So I ran over and said "stop! don't do it!" 
"Why shouldn't I?" he said. 
I said, "Well, there's so much to live for!" 
He said, "Like what?" 
I said, "Well...are you religious or atheist?" 
He said, "Religious." 
I said, "Me too! Are you Christian or Buddhist?" 
He said, "Christian." 
I said, "Me too! Are you Catholic or Protestant?" 
He said, "Protestant." 
I said, "Me too! Are you Episcopalian or Baptist?" 
He said, "Baptist!" 
I said, "Wow! Me too! Are you Baptist Church of God or Baptist Church of the Lord?" 
He said, "Baptist Church of God!" 
I said, "Me too! Are you original Baptist Church of God, or are you Reformed 
Baptist Church of God?" 
He said, "Reformed Baptist Church of God!" 
I said, "Me too! Are you Reformed Baptist Church of God, reformation of 1879, 
or Reformed Baptist Church of God, reformation of 1915?" 
He said, "Reformed Baptist Church of God, reformation of 1915!" 
I said, "Die, heretic scum", and pushed him off.