I get really wound up when (with cash in hand) I get stuck behind somebody charging a $1.65 cup of coffee at Tully's and the POS credit card reader won't work!
Or how about at the grocery store, when the clerk has finished ringing up about $160 worth of groceries for the lady in front of you... and
then she starts fishing through her purse, trying to find her checkbook. "Oh, do you have a pen I can borrow?" "Umm, which store is this, is this Safeway?" "What was that amount again?" "Oh, you need to see my ID, don't you... just a minute, let me look for it.."
The grocery stores I go to, I swipe my card while they're still ringing up the items, all I have to do is sign the receipt and I'm out of there in less time than you can give the cashier a $5 bill and take $3.35 in change!
tanstaafl.