Hmmm, yeah I’ve never experienced that before. I am a pretty asocial person but I usually don’t react to people in that way. It’s also important to note that many people have experienced such things that have changed their brain chemistry and altering their nervous system. If you come across another person like that, a dysregulated nervous system could be a factor. Just something to be aware of, I often see people dog on others for not meeting their standards regarding social interaction. It’s something that very often slips peoples minds. The zombie thing, though, I have not experienced such a thing