Numb3rs Fanfic Finders

I was just rewatching the Mythbusters episode where they chuck a car into water to see how quickly you'd able to get out of it. They talked about the differential pressure between the inside and outside of the car and this term just reminded me so much of Charlie that I was wondering if there are any fics out there where Charlie saves himself from a hairy situation through math? Bonus points if it is a sinking car, but the only ones I could find are Just a Mathematician and, of course, Reciprocity. Any others out there? Thanks!