Money, money, money...take 11

I called my 401k provider today and set up a loan. It went pretty fast and they say the check will be here within a week. I figured it would take a couple of weeks, but it appears to be quite simple. He rattled off the bi-weekly sum that will be directly subtracted from my paycheck. I still need to see if I will be able pay some of it off ahead of schedule, and what happens if by some chance I lose my job.