The Yamanote line stopped at Shinjuku, “due to an accident”, and remained still for about five minutes, making me late for my appointment in Shibuya. Then the driver said in the speakers that those who were heading for Shibuya should take the Saikyou line instead. So I followed the lämmeltåg to that platform, which looked like this:
I could only make it onto the second train, and while I rode it, there was information that the Yamanote line had resumed operation. I was 20 minutes late to my appointment but that was alright.