52° N Calcium Carbide cannons

https://youtu.be/VYoJD8-MwMw

https://www.gelderlander.nl/oost-gelre/van-carbidschieten-met-vrienden-naar-festival-met-1-250-bezoekers-het-is-een-beetje-uit-de-hand-gelopen~aff300ae/

You can open the link with Chrome, then hit menu/translate.
It seems like cannons made from milk cans, stuffed with a soccer ball and powered by calcium carbide  (+ water=acetylene gas) are a big thing in our area of NL around Xmas/New Year time.
It is legal, i don't think that you need a permit.
Here is one field a couple of kliks from BBBROEKERWEG.
Maarten says that you can hear them, pretty loud.
Looks like fun.