YouTube, [3:09], "Tractor Gathering - Starting a Field Marshall Series 2": https://www.youtube.com/watch?v=rsrQJELitxQ

YouTube, [1:50], "Starting a tractor with a shotgun cartridge": https://www.youtube.com/watch?v=xpDI1QGEj4w

Saltpeter touchpaper, a 12-gauge shell, and a mallet, instead of a key. It's pretty mesmerizing.