Perfect controlled demolition of twin chimneys - video

[MeJasonT]

My trin of thought went towards marine seismic survey and the use of intensifiers, Ok the air cannons in this case are sat in the medium and used to produce an almighty bang (and it is, every minuet - i worked in marine survey although my job was gravity and magnetics).
this should explain the theory

https://www.marineinsight.com/types-...ations-at-sea/

And this is an image of one of the cannons/guns

https://www.tes.com/lessons/gQNP5-RZ...seismic-survey

tried to attach image as it had more impact but site is playing silly beggers again 138k jpeg ?