Fleeting moment

In the back of a black cab speeding along Kingsland Road a middle-aged man's head is pressing facedown into a corner. As it goes by and pulls away I see a woman's hand clinging to the seat back. Two people in a long embrace lying on the backseat of a cab. Taxi driver no doubt casting furtive looks in his rear view mirror (rushing to get to the destination before it goes any further).