YouTuber Traps Lightning in a Glass Tube With Mercury and Neon

Mad scientist YouTuber Styropyro builds a mercury-filled evacuated bulb and, by pumping neon (and other noble gases) into a sealed tube and using a Tesla coil, creates dramatic lightning-like discharges—the triboelectric effect in action with different gas colors and tube shapes; a visually stunning but dangerous demonstration not for home tinkering.