The hardest tongue-twister

I saw this “pad kid” one mentioned elsewhere this past weekend, and I was surprised to find it pretty danged easy for me to say. Could be I was helped by a dose of cold medication, but like others above, this didn’t present me with a tenth the trouble that the “sixth sheik’s sick sheep” one does. I can usually do okay with many of the old classics like “toy boat” and “red leather yellow leather,” and though I hadn’t heard of “unique New York” before now, it presents me with no difficulty.

But that sheik one… man, I can’t even read it silently to myself without backing up three times.