***Warning. Spoiler alert*** Peter Jackson shows many subtle embellishments to the story of TLOTR throughout the trilogy, but one of my favourites takes palce in ROTK. When Faramir leads the fatal cavalry charge on Osgiliath, Orcs appear through the ruins awaiting their arrival. They are smeared in red blood. Now Orc blood is black (as frequently shown throughout the trilogy), so where has this come from? Could it be that these loathsome creature are feasting upon the dead? They certainly have despoiled the fallen, as they rain of severed heads upon Minas Tirith proves. The Orc liking for "man flesh" has been mentioned previously.
I think it is entirely possible that they are eating whoever was left at Osgiliath. Although the deleted scene of Saruman using the Palantir to heat up some Strawberry Pop Tarts could come into play.
an even greater mystery might be where did that screen grab come from? Remember what the first lesson was a AV school? Garbage in, garbage out! Gary