Abstract: An apparatus to prohibit user injury from sudden impact or rotational or whiplash movement. The apparatus includes a helmet, a body harness configured to secure to the user, a plurality of tethers and a plurality of spools. Each tether has one end attached to the helmet and an opposing end fixed relative to the body harness. Each spool is positioned with a tether in wound engagement with the spool. Each spool includes a locking mechanism moveable between an unlocked condition and a locked condition. Upon pre-determined movement of at least one of the tethers, the corresponding locking mechanism moves from the unlocked condition to the locked condition to prohibit additional movement of the tether.