Electrician working on live wire - GIF

Electrician working on live wire.

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Previously:

Electricians pulling wires through building - GIF
Demolishing a 300-foot electrical tower by cutting the guy-wires - GIF
Looped electrical wire twisting technique - GIF
Simple electrical wire joining technique - GIF

Super Dave moonlighting as an electrician.

That looks suspiciously like an energized coaxial cable, and he is removing the outer conductor and foil to break the shorted circuit at the end to prevent it from traveling further. Note how the sparking and the fire went out as soon as he finished