re: Anyone ever urinated while driving?

I do a lot of driving in remote areas that I don't know well and have pissed in the woods. One time after I did it, a dude pulls up to me around 3 miles down the road looking and mouthing something at me. I don't know how he saw me, but it's the only reason I could think of him acting like that. I now prefer the urinal while driving at 50 miles an hour method. He scared me.