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

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