Whenever I'm on stage doing a mic check, I try not to use the boring "Check, check" or "Testing 1...2...3..." and instead I recite something unusual, either the alphabet backwards, or a poem, or something equally obtuse.
Now I've got something new to shoot for... reciting 8,784 digits of pi, just like Gaurav Rajav, a high school student in Virginia. And get this -- it wasn't enough for the record. He was shooting for over 10,000.
I'm guessing that would be too lengthy for a mic check? I love the folks at FARK for finding this stuff.