Junior Johnson is one of the original NASCAR greats. One of the founders of the NASCAR circuit. He ran moonshine in the 40's and 50's, driving vintage, souped up, moonshine running cars of that era in the hills of the south, evading the feds. To this day he is on record as being proud of that. He was arrested and convicted of running shine (as I remember) twice. The phrase "Midnight Moon" originally referred to the moonshine that he ran in the middle of the night, preferably during a full moon, when he could run by the light of the full moon and thus not have to use headlights. Headlights would have let the feds know that he was coming. The phrase "Midnight Moon" is also, in the lore of shine running, a reference to the fact that Junior ran so fast that the rear end of his rig, in effect, "mooned" the feds that attempted to run him down.