This summer, when you fill your empty propane tank with anhydrous ammonia to make a delicious batch of methamphetamine, you could be damaging your tank! Smart meth-heads are using tanks they get from tank exchange programs like Blue Rhino. If you see a blue/green residue on your tank’s fittings, it’s time to turn it into your local tank exchange – whether it be in Riverside County or San Bernadino County – so it can blow up in some other asshole’s face. Remember, a smoldering trailer is a sad trailer. If you don’t believe me, take it from Hank Hill.