Old Port Mann Bridge explosion

[I am Canadian]

Pretty cool:

[twobits]

That is pretty cool. Amazing engineering solution. And who doesn't like a good explosives demonstration?

[fluffy]

And who doesn't like a good explosives demonstration?

Not me, that brings back memories of my younger years when I worked summers underground while going through post-secondary. The smoke trails you see leading up to the blast points is primer cord, an explosive cord that "burns" from the ignition point to the actual explosives that do the job. It is said that if you lay out primer cord along the ground and ignite one end, it burns at four miles a second. That's a little over 23,000 KPH.

[the truth]

looks like how 9/11 twin towers went down

[twobits]

Not me, that brings back memories of my younger years when I worked summers underground while going through post-secondary. The smoke trails you see leading up to the blast points is primer cord, an explosive cord that "burns" from the ignition point to the actual explosives that do the job. It is said that if you lay out primer cord along the ground and ignite one end, it burns at four miles a second. That's a little over 23,000 KPH.

And that is what makes it so cool. It is a controlled explosion. (we hope lol).
Been involved in enough pipeline jobs to know that it is an absolute science. Primer Cord comes in various different burn speeds . There are also time delayed detonators. It's the mix and match from an experienced powder monkey working with milliseconds of time differential that makes the explosion cool to watch. From a safe distance.