^%$#%$# was one rude Balrog.
He never wiped the gore off his feet before entering someone else's cave.
He never sharpened his fang on a hmunsa bone before eating.
He unshadowed himself before the lady of the cave.
He massacred other Rogs' pet Orcs without permission.
He washed his wings in other people's volcanoes.
And, worst of all, he $^#$ed on Gothmog's fried Cthulhu.
No Rog had ever unbodied another on purpose before; but sometimes enough is enough, and this was one of those times.