If you have 18 minutes - and if you don't, set them aside - watch this video detailing the history and usage of the Amen Break. It's a 6-second drum loop nicked from a song called "Amen, Brother" by The Winstons, released in 1969. It's the single most used break in history, and is responsible for spawning, oh, I don't know, 10 genres of music. I watched this in 2006, so am just posting it here for people still in the dark about it. No matter who you are on this site, I can guarantee you've heard this break hundreds of times and didn't even know what it was. Most of the time, it's slowed down drastically to act as backdrop to a track, be it for Bassbin Twins, DJ Shadow, DJ Krush, etc.
To hear "Amen, Brother" in its entirely, watch this video: