Using the Apple Retail app to pay for items like this makes me really nervous. The 2 or 3 times i've used it i've ended up walking out of the store waving the

Using the Apple Retail app to pay for items like this makes me really nervous. The 2 or 3 times i've used it i've ended up walking out of the store waving the product and the receipt screen on my phone around to make a point of being conspicuous so I don't get jumped on by security.