It's one of Danny Boyle's best works and we kind of can't believe we've never covered it before. Here are a few things you didn't know about 28 Days Later. Remember the sequence in the lab with the chimps that essentially kicks off all of the events of the film? That chimp there is named Johnny, by the way, boom, bonus thing right out of the gate. Anyway, you probably didn't know just how hard it is out there for a chimp. First off, you can only work with chimps until they're about seven or eight years old, because they become considerably harder to work with after that, like Lindsay Lohan. But unlike Lindsey Lohan, chimps can live to 40 or 50 years old. So, they also had to create legislation to disallow putting chimps down just because of their age. Boom, bonus thing. That means there's a limited availability of chimp actors overall, since most of them have aged out and are taking it easy in whatever the chimp equivalent is of Boca Raton. Ultimately, all working age show biz chimps