For New Years eve I put about 10 800mfd/450 volt electrolytis in parallel and made a voltage doubler fed by a 60 watt lightbulb to slow charge them to about 300 volts. Dropping a empty beer can on the rails connecting them would make a blast louder than a gunshot, destroying the can completely.
Around midnight, the police came from a neighbors complaint to see who was shooting a gun. He was sure he had the culprits when he saw us laughing and cutting up. When he asked "who's got the gun", I dropped a beer can on the electrolytics. Needless to say he was NOT amused but realized he couldn't do anything more than tell us to stop. He did jump back FAST!
Putting the pack in a plant for Halloween and dragging a screwdriver across it with a string worked great scaring the neighborhood kids!
Finally one of the electrolytics shorted and blew the vent plug. NASTY!
As I look up there is still one of the 800's on my desk...
