Not sure how many have saw the movie but at one point Gene Hackman puts Wil Smith's cell phone in a potato chip bag, the kind that are foil lined, to stop the signal from getting out to the NSA guys that were tracking them. Well, I had a chip bag from dinner tonight(Subway sandwich and a bag of chips) and thought I'd try it just for grins. I put my cell phone in a small paper bag to keep the chip oil from getting all over it then put it into the chip bag and rolled up the bag. Then I ask my wife to call my phone and guess what, no signal got through. She could hear my phone ring in her phone but my phone in the chip bag never rang which means the signal was block. Then, just to make sure it wasn't a fluke we put her phone into the bag and I called it and same result, her phone didn't get signal and didn't ring. Totally awesome, and I guess you could use it as a storage bag against EMP too. Anyway, just had to pass that along to ya'll.