"I am the bullet in the chamber" ran the strapline for the Nike advert featuring Paralympic champion Oscar Pistorius. As the South African athlete faced charges of "premeditated murder" in a Pretoria courtroom following the shooting dead of his girlfriend Reeva Steenkamp, his sponsors went into crisis-management mode."I am the bullet in the chamber" ran the strapline for the Nike advert featuring Paralympic champion Oscar Pistorius. As the South African athlete faced charges of "premeditated murder" in a Pretoria courtroom following the shooting dead of his girlfriend Reeva Steenkamp, his sponsors went into crisis-management mode.