[quesera]

Yes -- one hand does the work and is more likely to come into contact with energized wires or rails. If the other hand is supporting your lean against the conduit or enclosure (grounded), the path is through your heart. We're conditioned to use both hands for everything, so it's extremely easy to "forget" or "cheat just for this step" and use the other hand to balance, or hold, etc. Having your hand firmly in your back pocket is unfamiliar enough that we remember, and far enough that a quick instinctive response is interrupted.

Wooden broom handle is a non-conducting lever that a helper can use to separate you from the energized equipment. The current can cause your hand muscles to spasm in a "gripped" position, so the broom handle might need to be applied with some force. This is a last-resort catastrophic situation response.