@Kburger – after a run many runners have expended so many calories that they feel they can have a treat, regardless of calories, as they soak their aching feet in an ice bath or lounge on the couch. (This is after they’ve cooled down, stretched carefully, etc.)
My sister who has run multiple marathons and trained others to run marathons has often said to me: “I ran today, so I can eat whatever I want.”
Immediately after a long distance race, however, most people need a while before enough blood returns to their digestive system (oxygen rich blood gets diverted to runners limbs while they run long distances – so only really simple carbohydrates and liquids like those gel squeeze thingies can be handled by the stomach during the race)...and then they can eat. It depends on the person, but I don’t think most people go for a greasy Big Mac minutes after a race.
When I do my “long” runs on the weekend I do tend to treat myself to a Peanut Butter Milkshake—because I track my nutrition and calories on MyFitnessPal and try to eat the appropriate (not under, not waaay over) calories for me.