A first hand account from the Atlantic's Graeme Wood:
The protesters pushed back the pro-Mubarak crowd. Some of their charges (it really looked like a Civil War battle charge designed to overrun an enemy position) were so intense that I feared for the pro-government crowd's safety. That worry rapidly vanished. The pro-Mubarak group turned out to have great strategic depth, reaching all the way back to the Nile and beyond, and with sheer numbers it pushed forward, gradually rushing past the protesters and me. The Mubarak forces screamed "Yes Mubarak," and the protesters alternated between "Leave!" and "God is Great!" -- with the latter noticeably favored during moments when the protesters had the initiative. The injured were carried back, most with bloody head wounds. Seven middle-aged men stood in prayer next to a tank during the height of the stone-volleys, remarkably placid-looking, like the string quartet fiddling as the Titanic went down.