It was impossible to walk past this stallholder in the Sullivan Street Sunday fruit and veg market without asking the question why? The answer was very simple. Apparently it is a very effective cure for a bad headache. She was very happy for her picture to be taken when I told her that she was the first person I had ever seen wearing a piece of lettuce. "Don't worry" she told me "I won't be the last". Just one of those surreal sights on the streets of the Big Taco which confirms Mexico City as the true home of magic realism. What surreal sights have you seen on the streets of a city??