Hippolytus

“ Thunder is produced in many ways; for stones very numerous and unusually large, being rolled downwards along wooden planks, fall upon plates of brass, and cause a sound similar to thunder. And also around the thin plank with which carders thicken cloth, they coil a thin rope; and then drawing away the cord with a whirr, they spin the plank round, and in its revolution it emits a sound like thunder. ”

“ Placing a cauldron full of pitch upon burning coals, when it boils up, (though) laying their hands down upon it, they are not burned; nay, even while walking on coals of fire with naked feet, they are not scorched. ”