One customer, Lether Kerney, wasn't paying attention when she pulled up to the BP gas station on Williamsburg Road - which was charging $5.99 per gallon - shortly before it jumped another dollar to $6.99 per gallon.

"I had half a tank of gas, so when it got to $25, I started looking to see what was going on. And after I got to $30, I was like, 'oh my God! I spent $35.45 to fill up my tank. Six gallons of gas for $35. That's absolutely ridiculous," she said, adding "Usually, it's under $3.00. This BP service station has always been the cheapest, and I didn't even look at the price before I started pumping."

Another customer who goes by 'Cha Cha' told KMOV4 that she lives blocks away from the gas station and watched as the price continued to rise.

"I live two blocks from here, and it was $4.99," she said. "So, then I drove up the road to get gas at a $2.99 gas station, came back through here, it was $5.99. And now it's $6.59."

A few minutes later, it was $6.99.

"You can't do that to people," said Cha Cha.