Floor-Twenty
Any day when one luckily finds a $20 dollar bill in a public location before any other indvidual can get his/her greasy fingers on said bill. A floor-twenty discovery is followed by rushing out of the public location, cackling like a mental patient just off thorazine.
I had to cough up $13 for my herp' prescription, but then I saw a floor-twenty and scooped it up post haste.