He watches the first half, but notices that there's a seat about 10 rows up from the field right on the 50 yard line that hasn't been used during the entire game.

During half-time, Joe manages to get past security and makes his way to the empty seat. He approaches the man next to the seat and says "Excuse me, sir, but is this seat taken?" The old man answers "No, son".

Joe sits next to the old man and watches the game for a few minutes. Not believing his luck, he turns to the old man and says "I can't believe someone would hold a ticket this good and not come to the game. I wonder what happened?"

The old man smiles sadly and says "Well, son, the seat belongs to me. You see, my wife and I attended every Super Bowl game since 1967 together, but she died and couldn't make it this year."

Joe says "I'm so sorry to hear that, but couldn't you have invited a relative or close friend to come with you?"

The old man says "No, son, they're all at the funeral".