Shares of Tesla Inc. (TSLA) tumbled this week after the firm posted disappointing quarterly results. Investors, impatient with a wider-than-expected loss and the pushing back of previous production targets, sold off shares by nearly 5% following the report Wednesday.

In an earnings call with analysts, Chief Executive Officer Elon Musk offered a glimpse into the mass-market Model 3’s “production hell,” likening it to Dante’s "Inferno" and indicating that he has been there alongside his employees working day and night to correct production delays. (See also: Tesla's Margin for Error Is ‘Uncomfortably Thin’.)

Musk hosted the call from the Tesla Gigafactory in Nevada, indicating that he “doesn’t really have a desk” but moves himself to “wherever the biggest problem is in Tesla.”  The CEO, who is also the leader of companies such as the Boring Co. and SpaceX, posted a picture on social media of himself and his colleagues camping out on the factory roof, roasting marshmallows and drinking whiskey. He explained to his Instagram followers that he chose the roof over a hotel in Reno because it was faster than going to the nearest town.

'A Clear Path to Sunshine'

The CEO indicated that he was “really depressed” about three to four weeks ago when he realized that the firm was at what he saw as the ninth circle from Dante’s Inferno. Now that Tesla is “close to exiting level eight”, he said he can see “sort of a clear path to sunshine” and feels “pretty optimistic.”

In “Inferno,” 14th-century poet Dante Alighieri portrayed hell as nine concentric circles of torment, each with its own nightmarish form of suffering.

While delays in Tesla’s production schedule have been blamed on one key supplier failing to deliver on time. "At the end of the day, everything is our fault—and my fault most of all," admitted Musk. "If we pick the wrong subcontractor, we're the fault.” (See also: Elon Musk Says He Might Be Bipolar.)

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