Here's a bizarre random act of violence.

An unidentified teenager in Britain ran up to a cosplay performer and intentionally knocked him off his perch while he did a routine as Predator. The entertainer fell onto a little girl, while the perpetrator casually darted away. He has yet to be found.

The incident was captured on camera. More amazingly, the suspect knew he was being recorded.

A local media outlet posted the video on its Facebook page in the hopes someone could identify the teen behind the prank. Some people commented that they had seen the suspect pull similar stunts. Police continue to investigate.