Boys and men , mostly all wearing helmets , hang on to two separate cars while they ride skateboards .
There is almost no chance that a gang of skateboarders is trying to escape from foot police .
There is almost no chance that a gang of skateboarders is trying to escape from foot police .
Chances are about even that a gang of skateboarders is trying to escape from foot police .
A gang of skateboarders is trying to escape from foot police .