In college I worked part time at a daycare. One of the kids there I knew was a big Iowa State fan who always went to games with her parents. On the Monday after the 2007 Iowa/Iowa State game I asked her if she had gone to the game. She replied by saying "I saw you there. You stopped and played catch with me and my dad for like 20 minutes." Needless to say, I was good and drunk and had absolutely no recollection of having seen her, let alone playing catch with her for 20 minutes. That made for an interesting explanation to a 3rd grader why I had no memory of having spent 20 minutes with her.
It could have been worse...