The US's largest police department wants amateur acrobats who perform on New York City subway trains to take a seat.
So far this year, the New York Police Department has arrested more than 240 people on charges related to acrobatics. This time last year, police had made fewer than 40 such arrests.
The subway acrobats say they are just out to entertain and make a little cash. But police say they create a safety risk for passengers by flipping, somersaulting and pole-dancing in crowded cars.