And if a punter starts to cause trouble, staff are expected to practise voice control "so you are not returning any sign of confrontation or aggression".

BBC: Makeover for the men in black

But he says BT could make the deal worth its trouble if it's able to control costs.

FORBES: Once More Into The Breach For BT

Local authorities there are able to issue dog control notices at the first sign of trouble in an effort to deal with animals before they become a danger to the public.

BBC: A muzzled and leashed pitbull terrier

The current ones, for example, allow major shareholders to continue to control insolvent companies, even though the financial trouble is often their fault, says Tom McGowan, an international legal counselor in Taipei.

FORBES: The ghost of Chiang Kai-shek

There may be plenty of reasons why teams and leagues have trouble with cost control, though weak-kneed management that tends to buckle under these kinds of ultimatums are certainly a big one.

FORBES: Jets Should Tell Revis to Take a Hike

Meanwhile, through the film, the ambitious, but out-of-control Jen causes so much trouble for others by violently resisting Li Mubai's offer to be her teacher.

CNN: From Our Correspondent: Movie with a Message