SaintsFan, that's easy. Bruce Willis 2 years ago during Lakers game. I asked about his movie he was making in NOLA, and he barely answered. Tried to change topic to go to game, and he started talking college hoops and bracket busters (game was in March). So I tried to go down that road too... eventually I tried to ask him about NOLA and music in the city and referenced he played music... yeah, just didn't go well at all.
Later, I heard he did one with the Lakers b'cast that was even stranger... but theirs didn't get posted. Our interview was all over the place in 5 minutes! It was strange.
(movie he was making was Red)
Months later (after we all thought he had been drinking) we were told he had had a surgical procedure that day, and the medication + the drink or two he had at the game had him all loopy.