Been there done that, all too often. The worst I ever got was while I was standing in about 2-3 inches of dry leaves in my back yard calling my dog who had decided to chase a cat into the woods. After about 3-4 minutes, I felt a fire ant sting me up near the top of my right thigh. Looking down, I found that I'd been standing in a well-disguised fire ant mound and that they had waited until there were ants all the way up both legs before they decided to sting me. I had on blue jeans and heavy work boots which I immediately started to strip off as fast as I could. I'm dancing around trying to untie my boots, unbuckle my belt to get the pants off and swat the fire ants away, all at the same time. I'm sure that it would have made a very funny YouTube video which thankfully was not around at the time. Final count was about 50-60 stings on each leg from ankle to crotch. I hate those little buggers and exterminate them as soon as I see a mound in the yard.

Jim Smith