If I remember my Breaking Bad, meth labs produce poison gas if there’s an accident, not explosions.
Not to get too far away from my “joke”, the precursors to meth are very harsh, and flammable.
I think it’s cooked under pressure as well.
But again, I said my original post with my tongue firmly in my cheek.
I’ve seen a city block blow up because someone nicked a gas line under the road. KA-BOOM! (After about 6 hours. )