This won't make any sense if you don't watch Justified, but then again if you don't watch Justified YOU DON'T MAKE SENSE TO ANYONE. This would be the way it happened, though in a variation from the show's plotline Stewart would probably have accidentally put poison in both glasses, and then watched as Holgorsen downed two or three glasses harmlessly before drinking his own. Getting to know...the mystery...
WVU, meanwhile, has Stewart's negotiations on a concluding phase in his separation agreement on hold and is investigating leaks in the football program.