Humanity has passed a long way developing from primitive people into great people who invented computers, internet, mobile-phones, etc. And scientific fiction comes true; human civilization has developed a lot and people invent something new every day. If you get a person of medieval ages into the 21st century, probably he/she will go crazy with television, radio, computers, disks, micro ovens, washing machines and other electrical technologies. He/she will probably consider all these objects of common use to be the magical instruments created by a witch or a warlock. And cars will be some kind of iron monster for him/her.
