Or you could have some workers who left the top off buckets they were using to make blends... and emtpied their tip jar money onto the counter above the buckets... and let a screw that had made its way into the jar (thrown in with someone's spare pocket change) fall into the bucket of beans.
But that wouldn't be bad enough - would it? You could then go to grind a shot with your Swift grinder and its expensive ceramic burrs and hear a terrible noise.
Option A - call the technical guy who's always on call and ask him what to do (that would be me)
Option B - keep turing the grinder on and off to see if that terrible gnashing metallic noise goes away
You already guessed it - right? Sure enough... they chose Option B and then called me when the burrs were shot and the burr mounting assembly was totally hosed. I like the idea of the magnet.
New York Central Coffee Roasters