Mma Ramotswe rose to her feet, allowing the woman beneath her to gasp for air and reinflate. She did not enjoy sitting on people, but every so often it was necessary, and in this case it was entirely justified by self-defence. If people came at you and started to scratch you, then of course you had the right to sit on them. Even Nelson Mandela, she told herself, who was a good and gentle man, would have agreed with that.