Fire, in various states, including vortices.
Tesla coils, in various states/conditions.
Santiago Ramón y Cajal.
The drawings of pioneering neuroscientist Santiago Ramón y Cajal. The 1906 Nobel prize winner detailed the microscopic, serpentine arborizations of brain cells, among other exploits. As a precocious 11 year old boy, he also managed to raze his neighbor’s gate with a homemade cannon.