Johnson [[xxvii]] has built many novel linear and rotary motors and at least one self-powering magnetic rotary device — later stolen in a mysterious break-in at his laboratory — personally tested by the present author.  Johnson uses a bidirectional "two particle" theory of magnetic flux lines which can be justified by Whittaker's earlier work showing the internal bidirectional energy flows in all potentials and fields.  He also utilizes controlled spin-waves and self-initiated precise exchange forces, which are known to momentarily produce bursts of very strong forcefields [[xxviii]].  His approach is to use highly nonlinear assemblies of magnets which initiate the foregoing phenomena at very precise points in the rotation cycle.  In short, he seeks to produce precisely located and directed sudden magnetic forces, using self-initiated nonlinear magnetic phenomena.  This is analogous to what the Wankel engine did using the Lenz law effect by sharply interrupting a weak current in a external coil.  We point out that the Lenz law effect and other very abrupt field changes momentarily produce not only an amplified Poynting energy flow component, but also an amplified Heaviside energy flow component as well.