http://news.bbc.co.uk/2/hi/americas/8152278.stm

A man in the United States popped out to his local petrol station to buy a pack of cigarettes - only to find his card charged $23,148,855,308,184,500.
That is $23 quadrillion (£14 quadrillion) - many times the US national debt.
"I thought somebody had bought Europe with my credit card," said Josh Muszynski, from New Hampshire.
He says his appeals to his bank first met with little understanding, though it eventually corrected the error.
It also waived the usual $15 overdraft fee.
"It was all back to normal," Mr Muszynski told his local television station, WMUR. "They reversed the negative balance fee, which was nice."