The girl looked 18, perhaps she was even younger, based on her school uniform. It was difficult to tell who was an adult just based on looks.
As for the three guys, all of them were in their twenties. One man grabbed her hands, forcing her against the wall, while the other pinned her legs. The last guy was leisurely watching them with disinterest through the camera.
Either they didn't notice him, or they didn't care enough. That's when Jack kicked an empty can of soda, hitting one guy in the head.
He turned around, glaring at Jack. The other guy noticed him too and turned around, only the cameraman ignored him.
"Look, I don't care if you're filming amateur stuff or if it's just your hobby," Jack said, pointing at the food truck. "But for heaven's sake, take it somewhere else or you'll ruin everyone's appetite."
The guys looked at the cameraman, who waved dismissively at them. One guy smiled and headed towards Jack, cracking his knuckles.