Street Sense nearly had heat stroke?

[Merlinsky]

I don't get HRTV but someone who does told me Nafzger said in an interview that Street Sense needed water straight away because he nearly had heat stroke over by the winner's circle. I know it was kinda warm out there right? How'd he look? Certainly explains how Calvin could read that he had the measure of Grasshopper but then you have the horse switching to his left lead and appearing to have heat stroke later. He must've had the gas in the tank but felt like crap due to the heat so he was fighting through that.