Had a core box full of sand collapse right as the boss walked by on Tuesday
The whole mold for a 200-pound gear blank just slumped over, and he just stared at it for a full ten seconds before asking if we were building a sandcastle instead.
Found that the trick is to just own it... once the sand went I told my boss hey at least it's not a real sandcastle like @baker.mary would build. He laughed and told me to just start a new core while he grabbed coffee.