Months after the infamous Swiss cheese man terrified city residents, Philadelphia has a new public masturbator on the loose.

Friday afternoon, a Temple Ph.D student was riding a SEPTA bus when the man next to her pulled down his pants and allegedly started to masturbate. The woman asked the man to stop; when he didn't, she began filming him with her phone's camera.

"You know this is on video, right?" the woman asked in the video, which was obtained by NBC Philadelphia. "You really wanna do that? I have it on my phone."

"Are you crazy? Do you see how many people are on this bus? Do you see a child behind you? You are disgusting."

Eventually, the man—who seemed completely shocked by her angry reaction—responded.

"Are you serious right now?" he said. "I'm standing here the whole time. Why wouldn't you just say something?"

"Does someone need to tell you not to touch yourself in public on a bus?" the woman said.

Soon, others confronted the man, and he left the bus. Both the woman and the bus driver later called 911.

Police told NBC Philadelphia they know the suspect's identity but are waiting for a warrant to be approved before making an arrest.