"Some implants, clips, or shrapnel (ie, in veterans) within the patient’s or caregiver’s body can “twist” to align with the magnetic field. This twisting can be disastrous, if the forceful movement and position of these objects is such that they crush or pierce vital tissues or organs."
My friends...Mr Kerry has been caught in yet another lie.
Surprise! Surprise!
"This twisting can be disastrous, if ... they crush or pierce vital tissues or organs."
While kerry's derriere is vital to him (it must contain the CPU he thinks with), twisting of shrapnel in it might be less then fatal.