When dielectric oil is subjected to sufficiently high electric stress, electrons can be injected from the cathode and trapped, whereupon the charged fluid is driven away by the field. Experiments have been carried out into this high stress regime using a repetitive linearly rising and falling voltage ramp resulting in a current flow proportional to a simple power of the value of the applied voltage [1]. As electrons are injected and driven away from the cathode by a distance dx in time dt, the rising stress will promote stronger injection and the trapped electron density will develop an upstream directed gradient. A cathode directed charge gradient implanted thus into the dielectric fluid in an applied electric field is inherently instable with respect to the Rayleigh-Taylor mode. The gradient of electrical energy density ρeV can be expanded to provide −ρe−1∇(ρeV) = −∇V − V∇ρe/ρe ≡ E', (1) in which the first term is electrostatic while the residual one arises from the implanted gradient which will appear to enhance the field when directed against the potential gradient. Steady growth of the instability will take place when the viscous body force η curl ω resulting from the development of vorticity is balanced by V∇ρe and steady rotation ensues.