A man dressed as Spiderman is threatening to stay on top of a crane for a whole week in protest about fathers' rights.
Mr Chick is dressed as spiderman - his daughter's favourite character
David Chick scaled a 120 foot crane near Tower Bridge in London at dawn on Friday.
He claims he has been refused access to his three-year-old daughter despite a court order allowing him to see her.
Mr Chick said he chose to wear a Spiderman costume because he is his daughter's favourite comic book hero.
Police negotiators are talking to Mr Chick to try to get him to come down and Tower Bridge is closed.
It is the latest in a series of protests by the campaign group Fathers 4 Justice.
On 21 October two men dressed as Batman and Robin held a rooftop protest at the Royal Courts of Justice.
After their demonstration, government minister Lord Filkin, who has responsibility for the family law system, agreed to meet Fathers 4 Justice members at a future date.