TV interview interrupted by explosion and flying manhole cover


#1

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#2

To make things worse a bunch of teenagers photobombed the interview when they tried to get a second take.


#3

reminds me of this video.


#4

occasionally, underground vaults do explode (ie, from gas build up).


#5

Oh sure, the government wants you to think that was a manhole cover. What are they hiding?


#6

C.H.U.D. teenagers lighting farts


#7

It launches at ~19 s on the reply and lands around ~25, so ~6s for time of flight. Assuming it goes straight up (sin 90 = 1), v0 is 50 ft/s or 30 mph.

That puts maximum height around 70 ft.


#8

Whats the mass, around 10 kilos? At 15 m/s kinetic energy is 1100 joule. Looks like a mid range bullet in Ke terms


#9

I think manhole covers are more in the 113-136 kg range.


#10

10 kg? Maybe if it’s a cheese manhole cover.


#11

Okay so 120Kg gives 13Kj, same as a .50 BMG


#12

I witnessed this happen once in Boston at Brighton and Harvard Avenues. It was loud, and the ground shook. I thought it was an earthquake. The manhole landed on somebody’s car. RIP Herrell’s / Allston Cafe, the best ice cream place EVAR!


#13

Good comparison.

I’m pretty sure I don’t want to be anywhere near either of those two when they dump their energy into something.


#14

My actual reaction:
“Fuh-huh-huh-huh-huh-huh-uck!”

Exactly five huhs


#15

This is photogenic but not as good as this one below, it only made a single frame on the high speed film.
search/scroll for “Overacheiver”
http://nuclearweaponarchive.org/Usa/Tests/Plumbob.html


#16

Man, Santa has a lot of fun in the offseason.

Also: “World Champion Anvil Shooter” is something that I would like to add to my resume.


#17

I saw one of these too, preceded by a lot of nasty brown smoke being forcefully blown out of the vent holes. The cover only flew up about 40 feet, landing right next to a pedestrian who just kept walking, unperturbed as a Russian driver. I’m not sure if he didn’t realize how close to a gruesome death he had just come or was just unable to process it.


#18

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