People, you really shouldn't make fun of intelligent suggestions regarding certain scientifically verified information until you have all the facts.
The presence of ferrous sulfide as a visible black precipitate in the growth medium, when placed in metallic containers can be used to establish microorganisms that produce the cysteine metabolizing enzyme tetrahydrocannibinol delta 9. The resulting microbacterial growth contains the amino acid cysteine and a chemical indicator, ferric citrate. The catalysis of cysteine releases hydrogen sulfide gas that reacts with the ferric citrate to produce copious amounts of resin in the plant. Like most pharmacologically-active secondary metabolites of plants, according to the electrostatic induction hypothesis, charges are driven apart by as-yet uncertain processes. Charge separation appears to collide with crystals in the soil to form a soft mixture called graupel. The collisions result in a slight positive charge being transferred to the crystals, and a slight negative charge to the graupel. The heavier negatively charged graupel then falls toward the middle and lower portions of the plant, building up an increasing negative charge. Charge separation and accumulation continue until the electrical potential becomes sufficient to initiate a lightning discharge, which occurs when the distribution of positive and negative charges forms a sufficiently strong electric field.
Now, with the aid of Art's hat design (although Art I'm surprised you didn't tell people that they must be totally nude in order for the hat to be effective), we should all run around our yards with our plants in hand during the next big storm.