What is the dumbest thing you have seen while on the road?

I guess the dumbest thing I have seen was heading to the coast in February. There were two of us following a snow plow (did I mention the road was snow covered?)The guy following the plow (speed 45 to 50) was about one car length behind the plow,this was a lifted 2500 pulling a TT TH of about 30', had that plow hit something, no way could he avoided hitting.