(tl:dr at the bottom)
context:
my partner programming skills are pretty basic and he does not work in software development. instead he is in the largest (and only) electricity company here.
history:
one day his boss ask him "hey, do you know how to use google maps?"
Partner: "yeah, what do u need?"
His boss: "great! please make 10,000 routes with these coordinates, i need them for tomorrow"
Partner: "WTF!" ,grab his phone and call me, "(explains me te situation) dude, can you make like a script or something?"
Me: "Sure, but we'll need a loooot of coffee"
We spent 18 hours developing a routes generator with java-fx, mysql and JS.
Next day we went to deliver those routes and to "show" the system. They told us that after searching for 6-7 months, they wasnt able to find such a solution as ours.
Next day, I took a plane to this company HQ (My partner was food-sick, so i had to be there by my own), had a meeting with the TOP Bosses (on of them arrived in a Helicopter, lots of body-guards) and after a 3-4 hours, just like that, we had our first Big Contract with a huge ass company.

tl;dr:
we ended making an 8 months national project with the biggest and only electricity company with an 18hrs-developed system.