I am proud that I managed to pull it off, however I tell it as a tale of caution not as a tale of inspiration.
The work I did was objectively atrocious, by the 24 hour mark the simplest operation took me 5-10 minutes. My short term memory was completely gone by then and I had to rely on writing down each step of an operation as simple as refactoring a block of code into its own function, just to be able to pull it of in a "reasonable time frame".
Thus I would call bullshit on anyone claiming that his team made "huge improvements" and that after such a push some piece of software "started behaving like it should".
Unless that means that they introduced a plethora of bugs that they would be busy fixing for months from now.