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short-circuit (Moments before, a BC Hydro worker had spotted a metallic helium balloon drifting into the power lines on the 100 block of West Windsor Road, according to Mora Scott, BC Hydro spokeswoman. "When a metallic balloon touches a power line, it can cause a surge of electricity that short-circuits equipment, leading to power outages," Scott said.  nsnews.com ART Vancouver) | |||