My last direct encounter with Robert was at the ISU game in Ames in 2022. We were tailgating with a bunch of ISU friends all day long (was a night game) and around Noon, I saw Robert milling around, doing his usual thing (loads of zip lock bags in his jacket, going from tailgate to tailgate and filling them with food).
I yell out to Robert to get him to come over so that our ISU friends can have this treasured experience. We show Robert the food display and then he starts going through each food item, one-by-one, making the call as to whether or not the food is zip lock bag worthy. And, then he starts critiquing the food in his special way ("next time, if you cook the hamburgers longer so that they don't fall apart, I'll be able to eat more" etc.).
And, after he criticizes most of the food and walks away, our ISU friend says, "Who the hell does that Rainman [redacted] think he is telling us how to cook our food?"
It was delightful.