Some myths die hard. One of those myths is that if you put one foot on a ground rod, you are safe. This belief is based on the myth that the ground rod is at zero potential with whatever you might touch. The rationale for the zero-potential myth is the myth that electricity follows the path of least resistance (not true), and the ground rod is the low resistance path (false if you put your body in parallel with it).
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Power Lines and Grounds
Grounds are important for power line safety.