The pump price of gasoline today is partially due to futures contracts from quite some time ago. When the price of a barrel of oil was at its recent worst, there were also futures contracts on the NYMEX being sold for 2016 delivery (yes, 8 years in the future) @ ~$142/bbl. The ~$135/bbl that you were seeing in mid-May was for relatively short-term deliveries (June).
It was speculated last summer that gasoline would be up to $4.00/gallon this year but the sticker shock is currently causing a small, but significant downturn in consumption. It won't be enough in the long term as the result will be a downturn in the economy.
World demand for liquid fuels, by the way, will fall also due to the fact that many governments in Asia have been subsidizing the cost of fuel to help their economies grow. That system is beginning to fail due to the rise in cost and their citizens are just beginning to have to pay a lot more at the pump as well. As demand goes down, supply will go back up and cost will go back down. It'll all seesaw for awhile before finding a new equilibrium, which will still only be temporary.
Actually, the more turmoil there is with respect to price, the worse it can be for the economy as a whole. Economies work smoother and better when fluctuations are kept at a minimum.
Pidgey