Unique. . .

Until today, the most perplexing tongue twister I had ever come across was: "It's nice to know unique New York."
That one may be pretty well unbeatable, but this evening my friend Chey introduced me to a new one that gives it a pretty good run for its money. I don't remember the whole thing word for word, but you get enough to chew on with the last phrase: "Which witch watched which Irish wrist watch?" The first few words aren't bad (though the "which witch" combination might have thrown in a snag for a couple of my favorite professors who were both from Saskatchewan and who were admirably precise in their pronunciation of the "wh" in "which"). . .but "Irish wrist watch"? Tell me there's a chance!