A man appeared in a Massachusetts courtroom Monday after he was allegedly one of over 100 people who swarmed Boston city streets on bikes and scooters over the weekend, blocking traffic on several busy roads.

Adam Harrison, 22, appeared in a South Boston courthouse Monday on charges of disorderly conduct and resisting arrest.

On Saturday, video showed the group of people on bikes and scooters blocking traffic on Interstate 93, the Zakim Bridge and other access roads.

Witnesses described the group as young and chaotic.

"At least 100, on pedal bikes and then on the motor bikes. They were doing some wheelies. They were riding pretty good," said Clint Sanders, who saw the group.

Prosecutors said a Massachusetts State Police trooper tried to stop the riders near D and Summer streets in

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