© Bloomfield Executive CarsThe ice landed metres from a street cleaner.
Council worker Serhiy Myeshkov said he felt lucky to be alive after the sheet of ice smashed on the road metres away from him.
It is thought to have fallen from a plane flying overheard.
© Bloomfield Executive CarsThe ice smashed into pieces in North Road.
He told the Richmond and Twickenham Times: "I was sweeping on the other side of the road, then heard a loud boom.
"A piece of ice, maybe 10kg big, fell from either a plane or from the sky. It all happened very quickly.
"I wasn't scared, but it could kill you. I feel lucky."
The falling ice was captured on a taxi firm's security camera at 9am on Wednesday.
Employee Amir Khan, 39, told the Evening Standard: "It was like the start of a disaster movie, like The Day After Tomorrow.
"It made such a loud noise like a meteorite crashing down. The street cleaner was so confused and scared. Everyone came running out to look at the sky. It was crazy."
A spokesman for the CAA said: "Although ice does very occasionally fall from aircraft, it can also be the result of meteorological phenomena.
"We receive around 30 reported ice falls every year, although we are not certain how many of these incidents are the result of ice falling from an aircraft."
And from Sky News:
It is understood they can be caused by leaks from planes or when ice forms on planes at higher altitudes and breaks off in warmer air.
A Civil Aviation Authority spokesman said: "Ice falls can be as a result of meteorological phenomena, however ice falls from aircraft are considered to be rare in UK airspace.
© @huldatheprophetOnlookers took photos of the smashed ice block
Comment: The comments from the aviation authority hint at it being a meteorological phenomenon, and when we take into account the very dramatic changes occurring in our environment, it's possible these 'ice from the sky' reports may hint at the cooling of our planet:
- Chunk of ice, megacryometeor, falls from sky mysteriously crashing through Chicago man's ceiling
- Chunk of ice fell from the sky and shocked local residents
- Block of ice weighing 30kg falls from the sky in India
- 50-pound Ice Chunks Fall From Sky
- Mysterious chunks of ice fall from sky near Los Angeles in clear weather
Also check out SOTTs monthly documentary: SOTT Earth Changes Summary - January 2018: Extreme Weather, Planetary Upheaval, Meteor Fireballs