Probably one of them urban legend things, but it is still funny as hell.
Makes me want to get some from the bank to test drive on the local fast food places. As it is, they already don't trust the idiots working the drive-thru to speak, as they play a recorded greeting each time. They punch little pictures of the food on the register so they won't have to know that a burrito is 69 cents. Of course, they are currency experts when it comes to $20 bills though. They get all Barney Fife like with their magic pen. Same with those people at the store who ask you for ID when you use your credit card. These people are being paid minimum wage, they are not fraud detection wizards. I am sure most of them wear velcro shoes. I have more thoughts on the decline of our service economy. I will share them in an upcoming installment.
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.