Around 1:30, a protest erupted suddenly at the Lawyers Syndicate, a hotbed of opposition political activists one mile north of Tahrir Square, where about 200 activists began pushing onto the streets. Rows of riot police quickly pushed back, hoping to contain them within the syndicate's gates. Soon after, a second crowd gathered across the street. As riot police scrambled, protest leaders began appealing to nearby pedestrians to join in, and some did, boxing in the police. Meanwhile, a group of former opposition parliamentarians held a third protest on the steps of the nearby high court, shouting demands for the end of Mubarak's reign. This group quickly gained strength and converged with the second crowd, overwhelming the riot police. The three demonstrations became one and began their push towards Tahrir Square.

Initially, riot police formed rows of human chains blocking off the square. But when the marching protesters met the ranks of police, a strange thing happened. The chains broke at every point, allowing the demonstrators to pass through. The police, it seemed, were simply unwilling to hold. At these edges of the square, and in the square itself, confrontations between protesters and security officials were few and far between. Jubilation was in the air as the ever-growing crowd passed the Egyptian Museum and took Tahrir Square with the astounding acquiescence of the police.

"I think the police are helping us," said Ghad party youth leader Moshira Ahmed Mohasseb, who led chants on the march toward Tahrir. "They're tired. Everyday they're fighting another strike in another place, and I think they're starting to think again."

As the crowd grew, a police officer, who might in the past have responded with his baton, instead took out a camera and snapped a photo. Whatever was happening, he wanted to record it rather than to stop it."

Things went on this way, with the crowd rapidly growing as the news spread, until it pushed beyond Tahrir Square, up Kasr el-Eini Street towards the Ministers Assembly, where protesters tried to break through the gates. Finally, riot police raised their batons. An armored vehicle, which had previously sat still, let out a burst of gas-infused water near the crowd in an apparent threat. The protesters paused. A pocket of them formed in lines for afternoon Asr prayers. When they were finished, they rose, screamed, "Allahu akbar" and charged en masse towards the riot police.

That was the moment any relative peace ended. Protesters threw shoes and rocks; government-hired, plain-clothes thugs beat protesters; police fired tear gas and shot water cannons. People ran wildly along Kasr el-Eini Street, taking refuge in side-streets as the police cordoned off the area in front of the Ministers Assembly and Parliament. Meanwhile, Mobinil cell phone service was terminated, and Twitter was blocked.