ONLY use this and it leaves floor spotless. (Heavy duty floor cleaner recipe: cup white vinegar 1 tablespoon liquid dish soap cup baking soda 2 gallons tap water, very warm.) It leaves everything smelling amazing.
Set a deck of cards face down on a bottle with the joker face up on the bottom of the pile. Start the timer. The contestant gently blows the deck of cards--trying to keep the joker on bottle. This task must be completed in under a minute.