In Egypt, Not The Army I Expected

The most striking thing about the amazing events in Egypt has to be the behavior of the army. I'm so used to armies, especially in autocratic countries, being reactionary, tools of the government, instantly seeking to impose martial law, etc. Yet in Egypt right now the army, while not actually fighting for the public, is providing cover for them and even advancing on the police, on occasion. It's quite an amazing thing to contemplate and to me makes it much more likely for Mubarak to resign -- how can he remain president with so little power over his country?