Longmont Potion Castle.

Before Crank Yankers, before Jerky Boys, a man with a very juvenile sense of humor and lots of free time embarked on a prank calling journey that would span decades and and make Denverites think twice before answereing their phones. LPC a.k.a. Virtual Balboa, Red Brown, Fennel Cartwright, Cooter, Dirk Funk, Gomez, Levi Goulet, Buddy Gripple, Grover, Reginald Maplethorp, Kermit Neville, Nipper, The Polish Stallion, Don Savage, Rusty Savage, Sissy, Dr. Slap, Bonecrusher Smith, Bo "Bobo" Tucci, and Nigel Zacket (just to name a few) pioneered prank calling with the use of various electronic aids such as a digital looper. If you are bored and enjoy this kinda shit there are hours of his annoying, belittling, interrogating, aggravating, and sometimes incoherent conversations floating around on the internet.

Here's a compilation sample of LPC's unique prank styling.