Gas Prices- When Will It Stop

There is an ongoing discussion among friends and family regarding gas prices. There are a few key components of this conversation:

1) Anger/disgust at how rapidly the price has risen.
2) Questions about what is fueling the rise.

Take a look at this CNN/Money excerpt:

“Gas prices are now about 3% higher than last month and 38.5% higher than year-ago levels.”

An increase of 38.5% in a year, are you kidding me. Are there any readers out there that can offer a logical explanation for this. Can anyone else name a product that is used with the same frequency and need as gas that has experienced a similar exponential increase in cost.