As the pressure inside his head gradually increased, Eich detailed how he became more and more unhinged with his design decisions. By the start of the fourth day, he had straight-up ditched classical inheritance in favor of prototypal. By the sixth day, his grip on reality had weakened to the degree that hoisting, different flavors of equality, the concept of being "truthy", and variable execution contexts when evaluating the "this" keyword all seemed like good ideas. Eich's mental condition progressively worsened through to the tenth day, which is when his eminently disturbed mind concocted the grotesque interplay between , and various arithmetic operators.
Upon completing the language and presenting his work to the team, Marc Andreessen had Eich immediately rushed to the nearest hospital, where he was treated and made a full recovery. The company, though, was stuck with the mutilated language while Eich recovered, and was forced to ship it with the next release of Netscape Navigator. The rest, is history.