Thanks for that info. That is pretty scary, the engine builders can't be getting any sleep.
I dunno, when a coolant system loses water, things usually get worse. The drivers aren't going to give up pushing until its absolutely necessary, ie; too late in some cases. And if a pushing driver keeps moving out to pick up some air, or pushes consistently from off to one side on the car in front (its probably safer not to move left and right while on someone's bumper), then aren't there going to be more spinouts of the lead car like the Mark Martin incident on Saturday.
Thursday should be "interesting". Too bad the guaranteed entry for the race covers a majority of the drivers. Those who have to race their way in will be torn between drafting, overheating and not finishing or losing power, or not.