My friend has this coin in a piece of lava: Rock showing coin The coin is a bronze Italy 5 Centesimi 1919, about 20mm diameter, apparently was pressed into hot volcanic lava. The rock is 2-1/2" x 2" (6cm x 5cm) and weighs 87 gm. It was probably made in Italy and sold as a souvenir, possibly Pompeii near the volcano Vesuvius. Vesuvius erupted in 1944 which may date this item.
Look at the ride height on that van. I don't feel like doing the math, but that added some amount of weight to the van. It looks slammed. Then again, he might be carrying copper ingots in the back as well.
He's got a bunch of highly conductive metal discs covering... highly conductive sheet metal. If lightning struck that van, it might leave some very interesting patterns on the outside of the van, but it certainly wouldn't hurt anyone sitting inside.
Another suspect volcano for my Lava Coin, Mt. Etna: I received an email yesterday from an man in Italy who said that the lava rock was colored more like a piece from Mt. Etna in Sicily than Mt. Vesuvius. He also wrote that there are lots of souvenir shops near Mt. Etna selling lava pieces, but he did not see any with coins in them.