Genzebe set the bar with her indoor assault, everyone went wild in training knowing they had to make up ground
Sure. None of them had any motivation to break their PR's by 9+ seconds each before they saw Dibaba do it.
Track fans have got blinders on. Too many runners just got too much faster all at once for it to be a natural occurrence.
There will surely be more crazy times, including possibly a world record in the men's 5000 if they run for time instead of Kenya vs Ethiopia.