1.   They managed to flag a taxi and they piled in amid a lot of shouting and general drunken bonhomie.

2.   Checking out of the decorated house at noon on Easter Sunday, I walked to Fifth Avenue to flag a taxi.

3.   People like to flag a taxi in a crosswalk, where picking up passengers is illegal.

4.   The officer who was abducted Friday was unharmed and flagged a taxi, returning to report to his commander at the police station.