The headlines of major newspapers and TV networks this week have been dominated by rising gas prices.  

Drivers across the country have shared their stories on the cost - with many already paying more than $4 a gallon at the pump.  There have even been reports of gas prices rising at a rate of 10 to 15 cents in a matter of hours.     

Read:  How high will gas prices go?

The swiftness at which those gas prices continue to climb was crystal clear Wednesday night during the broadcast of ABC News' "World News with Diane Sawyer." 

As ABC News' Cecilia Vega introduced her piece on high gas prices, the sign at the downtown Los Angeles gas station behind her showed the price of regular gas at $4.99 a gallon.   However when the piece concluded nearly two minutes later the price of regular gas had jumped 10 cents to $5.09 a gallon.  

BEFORE:

AFTER:

Even Vega seemed truly surprised to see such a drastic change in such a short period of time, telling Sawyer that "it is almost too unbelievable to believe." 

"It went up 10 cents?" asked Sawyer, herself shocked at what just had occurred. 

"Ten cents during that two minutes while we were on the air," confirmed Vega.

Watch the exchange here: