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Cecilia Carrasco, 34, says she felt someone shove her as she walked past the reception desk at her lawyer's office in Santiago, Chile.
The CCTV footage, which was shown on a local TV report, quickly went viral in her homeland.
Cecilia Carrasco says she felt someone shove her as she walked past the reception desk at her lawyer's office
She said: 'I hit the ground hard and had to be taken to hospital in an ambulance.
'I wasn't aware of anybody in front of me as I passed the reception desk talking to a girl, and as I looked towards the receptionist I suddenly felt two pairs of hands shove me over.
'I hit the floor but when I looked up I couldn't see anybody, and I thought they probably had run off.'
Ms Carrasco said she had never believed in ghosts and is now frightened of leaving the house.
She added: 'When the receptionist told me that there was nobody there, I didn't believe them until they showed me the footage. Now I am convinced that it was a ghost because I felt the hands even though there was nobody around.'