Captain Joe Hazelwood would be proud................
Had the same thing happen on the third or so oil change I did on my Box, the drain plug dropped into the drain hole of my oil drain pan, it created a mess but not too big of a deal to clean up. My 15 quart oil drain pan always worked well for me, have had it almost 25 years, similar to this:
Hopkins FloTool 11838 Oil Drain - 15 Quart : Amazon.com : Automotive
LOL.....looks like Sean had the same thing happen as me..................