This reminds me of an incident report I saw back when I used to work in a warehouse. A forklift driver raised the boom too far, and smashed it into a high power lamp. He immediately let go of the controls, and decided to get away from the forklift, rather than lower the boom, concerned that the metal levers might electrocute him. As soon as he stepped on the ground, he completed the circuit that was preciously blocked by the rubber tires, and paralyzed himself from the waist down.

The report recommended jumping clear, and then using this hopping escape strategy. It did not recommend or countermand moving the vehicle to break a potential circuit; I guess that situation is too complicated for a blanket policy.