A violent encounter between costumed superhero characters ended with Mr. Incredible slamming Batgirl on the sidewalk of Hollywood Boulevard in a fight caught on camera.

It was unclear what set off the altercation Tuesday in front of the TCL Chinese Theatre at Hollywood and Highland, and by the time police showed up no witnesses or victims were on scene.

In the video costumed Chewbacca and Waldo try to hold back Mr. Incredible as he grabs at a woman dressed as Batgirl, eventually throwing her to the ground on the crowded sidewalk. People watching nearby lunge toward the man after the slam, but no further violence appears to take place.

A man dressed as Spiderman said the sidewalk, filled with celebrity impersonators and people dressed as superheroes, is fiercely competitive as the characters collect money for photos with tourists.

“No one has respect for each other out here … it’s do or die,” he said. “Literally, everyone is feeding themselves.”

No arrests have been made. Los Angeles police are investigating the case.