What did this advertising promote?

　　Where did you see this?

　　What was the content of it?

　　Why do you think it is impressive?

　　故事线：关于在网上看到运动跑鞋的广告。

　　高分语料：Unlike a normal running shoe each toe was separate. It was really strange to see something like that because I had just been wondering a few weeks earlier why someone hadn't invented a running shoe like this before - and then a couple of weeks later by pure coincidence I came across them on the internet. I wasn't even looking for them or anything.