Warning: this video contains minor explosions, engineer talk, and a certain amount of pain. Maybe a little NSFW language, mostly covered by bleeps.
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Mehdi Sadaghdar of ElectroBOOM (previously at Neatorama) made an electrical device he calls the Photo-BOOM Electro-Pranker 3000. The purpose is to startle passers-by with sound, flashing lights, and explosions. He gets deep into the details of the electrical principles involved in this “ingenius” contraption. But that’s not what we are here to see. If you’ve seen any previous ElectroBOOM videos, you can probably guess that he ends up pranking himself more than anyone else. The last minute of this video is an ad. -via reddit