It ain't a fire ant story, but it is close to one. And it just came to mind.
Way back when, when i was about 21-22, my dad and i made a road trip from Houston to Neuvo Laredo. Basically, it is a trip straight down 59 South from Houston.
The rough halfway mark is Victoria, and somewhere south of Victoria we both needed to take a leak. This was about 2 or so in the afternoon on a bright and sunny day, so we pulled over in a spot where a small bridge crossed over a creekbed, and walked down the embankment (all concrete to the bottom) and took care of our business on opposite sides of a bridge support.
About the time we were finishing up, we walked around to the front of it and both kind of came to an awareness of a subtle buzzing sound that we had both heard the entire time, but not really been in the forefront of our consciousness, due to the business at hand.
We looked up to the spot where the column supports came to the bridge, which was only about 3 or 4 feet above our heads, and there was a very active wasp nest about the size of a basketball.
We just backed up slowly, and made our way back to the truck.