Philadelphia police are looking for five men in connection with an assault outside Geno's Steaks on June 11.
The men, all caught on surveillance video, fled in two cars - a dark colored pickup truck and an SUV - both with New Jersey license plates.
Police are also looking for one woman described as a getaway driver.
Police did not provide information about the assault, but said the video of it was "too graphic" to release.
"That is when the guys just lost their minds," said Patrick Kane, 31 and a maintenance supervisor at an apartment building.
In seconds one man stood up, put his hand over the face of the woman and pushed her across the sidewalk, said Patrick Kane.
"'Don't mess with us, we belong to ISIS,'" Kane said the man shouted at them.
Brooke Kane, a daycare teacher, stepped in to help her friend. The ISIS comment was not a joke she told them before she too was struck, Patrick Kane said.
At that point he and the other man stepped in to try and help the girls with the intention of leaving.
"What went from putting hands on two girls became five guys attacking us," said Kane.
Patrick Kane said one man punched him in the nose, which started bleeding. He was then punched in the back of the head by another man and hit twice in the eye. He remembers Brooke screaming at bystanders for help and to call police, the five men running off, someone from Geno's giving him a bag of ice and police and EMTs arriving on the scene.
"It is ridiculous that this even happened," said Patrick Kane. "I don't know why things have to escalate like this."