Was it supposed to be realistic? I thought they were superhuman. Its less realistic when you have human actors try that stuff without the help of CG. A string just doesn't cut it. At least in CG it looks possible. Even if the logic in your mind tells you its not. But there are animes with a lot less logical things going on. So no quirps there. As I do so enjoy my anime. And all the improbability that comes with it.