What's wrong with this picture

2010-07-05_18

My wife and I visited friends over the July 4th weekend. On our way home on I-65 (somewhere between Indianapolis and Chicago) we exited the interstate to fill our car's gas tank. That's when I noticed something odd about the first gas station we passed (see the picture above).

Can you guess what's wrong?

Hint #1: Gasoline burns when exposed to fire

Hint #2: Fireworks are small explosives

Startled by the sight, we returned to the freeway to fill-up at a gas station about 10 miles away, a distance I deemed safe in case of a fireworks accident (it only takes one idiot with a lighter to trigger an explosion).

Did anyone else question the safety of the combination fireworks/gas station or was common sense also on holiday over the July 4th weekend?

-Dr. Dave