Here is an interesting panel from issue seventy-one of the UK Masters of the Universe comic. Throughout his time in a variety of canons He-Man pretty much always fought fairly. This is the only time I can think of where we see him perform a pretty low move in combat; throwing dirt into Hordak's face! There is something oddly comical about it, too. He-Man is the most powerful man in the universe, and yet the only weapon he can muster is some dirt!
(click on the image to see it at full-size)