What's the Worst "Bill Shock" You've Ever Experienced From a Telecom?

Ron Dorff, 83, uses dial-up to connect to the Internet as one of AOL's 2.2 million remaining customers. In the space of two months, he racked up $24,000 in AT&T charges when his modem erroneously dialed an international number to get online. What's the most ridiculous bill you've received from a telecom provider?