Howard: Look, I was going over the schematics on my zero-G toilet, and I made a teeny tiny mistake on the specifications for the diverter valve.
Leonard: How teeny tiny?
Howard: It's gonna fail after about ten flushes.
Sheldon: But the mission is for six months.
Howard: Yeah, see, that's the code red. It's kind of like a jack-in-the-box, no one knows exactly when, but at some point something way worse than a puppet is gonna pop out of that box.