Abby is on a ladder, looking at a hole in the ceiling out of which dangle three wires. In her hand is a pair of pliers and on the table behind her her laptop is playing a video about replacing light fittings. She looks concerned.
"First, look at your wires." says the video. "White is positive, black is negative, green is ground..."
For no apparent reason, Abby reaches up and grasps the white wire with the pliers.
"Yaagh!!" she screams as a jolt of electricity somehow travels from the single insulated wire, through the insulated pliers to her arm, in violation of everything we know about how electricity works. Seriously, there's no way this can happen.
"Of course," continues the video, "make sure the power's shut off..."
"Abby!" calls Len. "What are you doing?"
Edge City, 2013-09-11.
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