Related Clues:

• Stoppage during thunderstorm?
• Discharge for sudden refusal to work
• Type of industrial action that a place only witnesses once?
• Spontaneous coming out not supposed to be repeated in one place
• Industrial action that could be shocking and fatal
• Unapproved union action from slight tinkering
• Sudden stoppage during storm
• Sudden problem at work, something a conductor can deal with
• Electrical discharge between atmosphere and something on the ground
• Bright flash from a gray sky
• Storm discharge
• Shocking awe?
• Immediately shocking action?