rdwj - probably ball lightning. Basically a stable plasma of ionized air. I've seen it a couple times & it does tend to follow electrical lines. Since it weighs almost nothing, it can be batted around by the wind and demonstrate some amazing accelerations and directional changes. Ball lightning has been created in laboratories, but only small ones.
Note:
I really doubt aluminum foil helmets help much. After all, your face is wide open and even if you use a mesh to protect it, that doesn't stop the the signals from being conducted up your spine. The only good solution is to put your head inside a large biscuit tin. Unfortunately, this process seriously impairs the hand/eye coordination, as the first step requires removing your head from your neck. Unless you have a Very Large Biscuit Tin.
Note:
I really doubt aluminum foil helmets help much. After all, your face is wide open and even if you use a mesh to protect it, that doesn't stop the the signals from being conducted up your spine. The only good solution is to put your head inside a large biscuit tin. Unfortunately, this process seriously impairs the hand/eye coordination, as the first step requires removing your head from your neck. Unless you have a Very Large Biscuit Tin.