Many passers-by, including religious Romanian students, spontaneously joined in.

But they happened to be downtown Tuesday and spontaneously joined the women's march.

He often visited the residence halls unannounced to talk with students or spontaneously joined them for lunch.

On the last day, Daniel carries out his plan, aided by Dara, who spontaneously joins him.

Romanian students spontaneously joined the demonstration, which soon lost nearly all connection to its initial cause and became a more general anti-government demonstration.

Many passers-by, including Romanian students, spontaneously joined the protest.

People are joining in so spontaneously, it's almost like the immigrants have risen.

In 2006, former president Bill Clinton spontaneously joined the line of troop-greeters when his private plane made a refueling stop.

A beautification campaign has planted flowers and trees throughout the city and residents are spontaneously joining the effort, he said.

Part of the promise of Bonnaroo is that musicians spontaneously joined one another onstage.