The slavic regions and in China, it was usually a dog or a cat doing the jumping. But in Romania, a bat flying overhead was said to reanimate a dead body. Zombies thanks to pop culture, we tend to think of zombies as undead flesh eaters that are especially hungry for brains. We have George Romero's night of the living dead to thank for that, or some of it at least. But not the bit about the brains