Firefighters based at the fire station nearby had heard shouting in the street and went out to investigate, where they were confronted and threatened by the man.
The 26-year-old suspect remained hostile and struck the window of one of the first police cars when they arrived.
Eyewitness Jenilee Graham said she was unaware there was a situation developing until a woman stopped her and told her to get away.
The 23-year-old City worker, from south London, said:
"I was coming back from Asda with my mum when we saw a woman who told us to stop where we were going. We didn't know what was happening, but then we saw the man who the woman was talking about pop out from behind a bus. He ran towards us, then he darted down a side street. It was obviously pretty scary."
Police officers tasered an armed man in Battersea today after he threatened them.
They were called to Falcon Road when members of the public reported a man armed with a knife.
The suspect was arrested on suspicion of attempted murder of a police officer and has been taken to a south London hospital with minor injuries.
One police officer also received injuries during the incident, but did not require hospital treatment. A number of knives have been recovered at the scene.
- The three sites in London are among of 67 cultural areas in 41 countries
- They are deemed to be at risk from the forces of nature, and social, political, and economic change
- Internationally, the sites range from the Italian city of Venice to the little-known village of Pokfulam in Hong Kong
Battersea Power Station has made it onto a lost of world monuments with threatened heritage, along with two other sites in London.
Deptford Dockyard dates back to 1513 and was built on the orders of Henry VIII. It was the administrative headquarters of the Navy from the Tudor era and later became home to a burgeoning community of shipyard workers.
Sayes Court Garden was established by writer John Evelyn in south east London in 1653. The plot was once hailed as one of the capital's greatest gardens.
Battersea Power Station has been placed on a list of threatened heritage by the World Monuments Watch. The London landmark is one of 67 cultural sites around the world deemed to be at risk from the forces of nature, social, political, and economic change.
Police have released a photograph of Kyle McDonald, one week after the 19-year-old was shot dead in a street in Battersea. Police are asking witnesses to contact them.
The local community have and continue to support us in our efforts and a large team of detectives are currently working tirelessly on this case.
Local Safer Neighbourhoods teams will remain in the area to reassure locals and address any concerns residents may have.
Any witnesses are asked to contact detectives on 020 8358 0200 or Crimestoppers anonymously on 0800 555 111.
Someone knows what happened that evening and I am urging them not to remain silent but to come and speak to us. Your information will be treated in the strictest of confidence.
Likewise I am directly appealing to the family members and friends of those believed to be involved - if you have slightest indication the person you know may have been involved in this incident I encourage you to get them to hand themselves into the police.
Failing to do so will result in my officers pursuing them.
Police have made another appeal for witnesses to come forward after a teenager was shot dead on a residential street in Battersea.
Police believe "a number of young people" may have information about the course of events that led to the death of 19-year-old Kyle McDonald.