When I returned to Tennessee in September of '99, I looked up a friend and was invited to stay there with him for a week. The day I arrived by backpacking, I took my equipment and was busy spreading the tent and tarp out on his mountain home property. When I squatted down a felt a sharp sting in the sweet spot behind one knee and I quickly stood up, ouch. I couldn't find the perpetrator, and no visible mark was left behind the knee, but almost instantly I had a pressure headache, and soon had symptoms of diarrhea and nausea. My friend only had an outhouse behind his house, and I remained in constant need of it for the week I was there. By the end of it, I still was weak in the legs, but was able to take a lift to Etowah, Tennessee, recuperate in the woods another couple of days, and then packed-out walking from there through Athens and Decatur, across the Cotton Port bridge, and into Dayton. From there after holing up and finding some work, I picked up and walked into Chattanooga past Sale Creek into Soddy Daisy, up the North Chicamauga Creek for 4 days and finally into the Signal Mountain area close to Stringer's Ridge tunnel. I left no trace behind me, as I was adequately trained in the field. But that bite was a lot of discomfort and can deduce it was not a scorpion since I personally know what their sting does. Whatever I hope to never meet it again. Very scary.