Police say a 21-year-old man dressed as Superman attacked some motorists in Ann Arbor early Sunday.

A group of men stopped their car to talk to some friends outside an Ann Arbor home when the alleged attacker jumped out from behind some bushes and into the vehicle, Local 4 reported.

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Witnesses Describe Attack

"I guess this young man jumped in the back seat of the victim's vehicle and just started hitting him and when the victim attempted to call using his cell phone, (Superman) grabbed the cell phone and he stomped on it," said Sgt. Angella Abrams, of the Ann Arbor Police Department.

The victims said when they got out of the car, people from the house party came toward the car, and a large street fight broke out, according to The Ann Arbor News.

No one was fighting when officers arrived, but two witnesses were able to show digital pictures they took of the alleged attacker, police told the paper.

Officers spotted the man in the crowd -- wearing a red spandex Superman costume -- and arrested him, the paper reported.

"He was in costume, and it was a pretty terrible Superman costume at that," said Mark Majewski, who witnessed the incident.

The motive for the attack was not known, according to police.

The identity of the man wearing the Superman costume was being withheld pending possible charges of assault and battery.