100 Grand

From OAPedia.com

100 Grand is a classic Opie and Anthony bit, available on the Demented World CD, from their days at WAAF-FM in Boston. In the bit, Opie and Anthony announce they are giving away "100 Grand." When an ecstatic caller wins the prize, they inform him they were referring to the candy bar and not $100,000. The bit was later imitated by a DJ on another radio station, which is now being sued by the "winner".

Ironically, O&A producer Erik Nagel won 100,000 actual dollars in a New York newspaper contest in September, 2005.