Maybe they were blowing it up to stop 5G rays from spontaneously generating viruses, in which case if they didn't really know what they were doing beyond a surface level it wouldn't come as a huge surprise.
If you don't need it to be predictable or timely or anything than filling the interior of anything large with propane/natural gas can be enough to create a boom like this. It's essentially just replacing quality with quantity
Also on a vaguely related note getting annual statistics for meth lab explosions is surprisingly hard
