A seven-year-old is delighted when a window washer dressed as Captain America turns up outside his hospital window.

Sean Baker was born with hypoplastic left heart syndrome and is waiting for a heart transplant at UPMC Pittsburgh children's hospital.

Only his right heart was properly developed before Sean was born and he waits for his operation at the hospital.

And his day is made when a man dressed as Captain America swings down to wash the window outside his room.

Sean says 'there he is' when the superhero appears outside as he sits on the window sill.

His mother tells him 'Batman's over there' as another window cleaner dressed as Batman works on another window.