There's nothing funny about that at all, but Sigma can't help but laugh. Joking around was his coping mechanism of choice, and until things were truly at their darkest Sigma could always find cheer in any joke, however distasteful.

Once he recovers from his bout of the giggles, Dr. Klim composes himself. "Hm. If it helps at all, that was an honest mistake," he confesses. "I was intending to break your neck, and it didn't go so well."