Gunpowder residue explosion at indoor shooting range - GIF and video

[Jon]

Gunpowder residue explosion at indoor shooting range in Brazil. Residue collecting between or beneath the floorboards? Was not cleaned correctly with explosion-proof vacuum (or should've been a concrete floor anyway?).



2:26 video. First spark around 1:33. To watch frame-by-frame, pause the video, then use the comma and period keys to move forward or back one frame.

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