Cool screen trick/hack on all OSX macs
Shows two ways to ignite thermite: magnesium and black powder, and a sparkler. You can also ignite thermite with a flint lighter since the flint releases small chunks of burning metal that burn at thousands of degrees. I used small amounts of thermite for demonstration sake. Be safe.
Shows the very basics of finger tapping on guitar.
An intro lesson on how to play natural harmonics and pinch harmonics on the electric guitar.