Police in China have unintentionally scored a massive hit on the internet with an instructional video on how to survive a knife attack.
The video starts with a sharply dressed officer explaining: "Today, we will teach you what to do when you encounter a knife-wielding assailant."
The camera then moves to focus on a man playing the role of 'attacker', brandishing a knife.
Rather than demonstrating a self-defence technique to reverse the odds in his favour, the camera pans back to find the officer fleeing down the road while screaming for help.
The 12-second clip has gone viral, racking up tens of millions of views from around the world.
Following the London Bridge terror attack in June 2017 in which five people were stabbed to death, the Metropolitan Police issued their own advice on how to survive a knife attack.
Similar to their counterparts in China, the police say you should firstly run away, without trying to surrender or negotiate.
If this isn't possible they say you should try to hide and make a barricade between yourself and the attacker.
Finally they recommend calling the police, but only when it is safe to do so.
