I had heard our galaxy's super massive black hole was a small percentage of the overall mass, but I didn't know it was that small. That's amazing, considering it's over 4 million times the mass of our sun.

Another way to look at it, also, is that the matter in accretion disks around black holes is slowing down and spiraling in due to friction. We ain't! We're content to just keep orbiting way out here in the galactic boondocks, at least until we collide with the Andromeda galaxy in 5 billion years.