What is in your wallet?
I saw on an episode of NCIS, Abby commented that most U.S. $20 currency has traces of cocaine on them. When one is used as a tube to snort the stuff, it then comes in contact with other bills, gets into an ATM and leaves trace amounts on other bills and on the roller wheels and other parts of the ATM, contaminating other bills it didn't actually come in contact with. But that was Hollywood writing, right? Not really.

Yuegang Zuo, a University of Massachusetts professor, headed up a recent study where researchers looked at 234 U.S. bills and found that 90 percent had at least small traces of at least one illegal drug. Bills from larger cities, such as Baltimore, Boston and Detroit, were among those with the highest average cocaine levels, while the lowest levels were found in Salt Lake City. Maybe those writers in Hollywood know a bit more about what they write than I gave them credit for!