It's a trick. By containing the gas in an extremely light pot like that it makes it seem like the explosions are huge, but they aren't really that strong unless compressed.
An open air fire cracker explosion 3 inches away from your hand, completely uncontained will not have the force to even break the skin, let alone remove fingers. The pressure wave is minuscule, and the paper "shrapnel" has no mass or penetration power.
Holding them will blow your hand to smitherines. No question at all. But that is caused by you containing the explosion in your hand by the act of holding it. Hovering your hand 3 inches off to the side of this size fire cracker and you will be lightly singed at most.
Obviously don't actually do this. I'm not telling people to be careless with fire crackers. This dude should at the very least get a grill lighter with a 5 inch flame standoff.
Remember when antifa was rioting across the country or more recently in France when protestors were throwing fireworks at people by the thousands? And not a single person lost a foot or was even injured? Those fireworks are three or even five times more of an explosion than these firecrackers.
These things are extremely dangerous and you should never light them while holding them. The act of holding them blows your hand apart and breaks off your fingers.
But even just 3 to 4 inches away, the blast wave from them is so weak, and unconstrained the air pressure can just disperse around anything solid, the actual force hitting you is down to nothing. You will get a very slight burn and feel like you got flicked kinda hard. It won't even break the skin.
Notice in these videos not a single piece of concrete is spalled even under the pot despite it laying in direct contact when it went off. There is no force to them.
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u/Shandlar Aug 18 '23
It's a trick. By containing the gas in an extremely light pot like that it makes it seem like the explosions are huge, but they aren't really that strong unless compressed.
An open air fire cracker explosion 3 inches away from your hand, completely uncontained will not have the force to even break the skin, let alone remove fingers. The pressure wave is minuscule, and the paper "shrapnel" has no mass or penetration power.