Every winter, some of the world's best puzzle solvers gather in Boston for the MIT mystery hunt, a competition in which teams of puzzle enthusiasts spend between 24 and 72 straight hours trying to solve what just may be the hardest recreational puzzles in the world. This American Life producer Lisa Pollak hung out with one team (named Dr. Awkward...a palindrome) as they worked towards the ultimate answer, the location of a coin, buried somewhere on the MIT campus. Check out the puzzles from that year's hunt. (13 minutes)