I came across an exposed roll of Kodak Max 400 that had been sitting in a desk drawer for what turns out to be 18 years. Took it to the lab and got back somewhat unexpected results. A quick bit of Internet sleuthing seems to point to extreme underexposure, but even accounting for a couple of stops of speed loss and base fog over time, the color degradation seems odd. Has anyone encountered anything like this with other forgotten, then processed, C41 film?