Gas prices drop record amount

• Story Highlights
• Average price of self-serve, unleaded gas in U.S. as of Friday was $2.78 a gallon
• Compared to $3.31 on October 10
• 53-cent drop in gas prices over the last two weeks sets another record
• Numbers based on responses from more than 5,000 service stations nationwide

(CNN) — A 53-cent drop in gas prices over