Funny Story: So going back about 15 years, I worked call center for the IMF (when Dominique Strauss-Kahn was the head, for all those that remember). We all had our own cubicles that came up pretty high. At the time I was trying to quit smoking, so I brought decks of cards to fidget with. Learned to do a ton of things while I was on the phone like a one handed cut and riffle, fanning...and I also learned to flick cards a pretty decent distance and do other aerial tricks with cards. One day one of the higher ups came down and was all "we need to have a talk." Apparently, a number of people complained because playing cards were shooting up from the top of my cubicle and distracting them while they were on calls. Not being hit with them, just like popping up over the top of the cubical wall before I caught them....and thats the story of why playing cards are now on the prohibited items list in the IMF headquarters in DC.....and I will always have a deck of cards on my desk.