This is the moment a group of police officers pinned down a man allegedly seen with two blades include a huge knife.
Cops from London Metropolitan Police were filmed pinning the suspect to the ground and shouting 'knife knife'.
One large knife can be seen taken from the suspect at Shepherd's Bush Green, West London, at around 1am on Tuesday.
The man, who was arrested for possessing two bladed articles, is now being held in custody in a west London police station.
A witness after the man tried to run, armed officers managed to pin the him to the ground outside a nearby Barclays bank branch.
The onlooker witness described the scene as "something you see in a horror movie".
While on his way home from a shift at a nearby construction site, the witness said he stopped to get a better view of the scene.
He got his phone out to film when he saw at least six armed police officers swarm in and pin the knife man down on the ground
He said: "I couldn't stop staring at that huge knife on the floor.
"It's not what you expect to see on your way home from work, or anywhere - it was just mental.
"It was like nothing I've ever seen in my life before."
A spokesperson for London Metropolitan Police said: "Police were called to the area around Shepherds Bush Green, W12, at 01:21hrs on Tuesday, 22 December following reports that a man had been seen with a knife.
''Armed officers carried out a search of the area and located a 48-year-old man who was searched and found to be in possession of two knives.
''He was arrested for being in possession of a bladed article and was taken into custody at a west London police station where he remains."