I recently played Clue for the first time and realized that B.S. is Clue with playing cards, only you can't rely on notes.
It's closed-book Clue.
The mental challenge eases somewhat when someone inevitably accumulates most of the cards and begins calling "B.S." on everything.
Idea: The World Series of Speed.
I looked at cup stacking and thought: Why not Speed?
Where the Speed competitions at? They would be swell on television.
It's filmable (overhead view), easy to follow, exciting…
World Series of Speed Main Event Idea: A ten-deck marathon.