Odd Mullein

The other day I walked down the road a little further than usual and found this unusual plant.  It is Common Mullein, an odd-looking plant in the first place, but this one was REALLY bizarre-looking:

The whole plant was about eight feet tall.  I’ve seen many Common Mulleins, but never one with these multiple flower stalks at the mid-section, and never one as tall:  

Maybe a showering of farm chemicals was to blame for the berserk growth pattern.  Usually, the Common Mullein has only one flowering stalk above its leaves.