Erin Rogers was waiting at a bus stop outside Vauxhall station when the crash happened.
It was a bit surreal actually. I just had a coffee in my hand, I looked up, heard a bang and saw bits of crane debris falling to the floor.
Then the helicopter was in flames. The rest of the people at the bus station were looking on going 'What was that?'. It's something I will never forget for a long time.
More top news
Boxer Amir Khan sparked laughter in Las Vegas when he aimed a verbal jab at Republican presidential candidate Donald Trump.
The chart-topping NHS Choir who beat Justin Bieber to number one have signed a Hollywood film deal to tell their success story.
Janet Jackson is expecting her first child at the age of 49, according to reports.