Do You Think That Was An Attempt To Scam Other Customers?

I went to Braum’s store to get some milk. There was a couple with a cart full of groceries getting them scanned by the cashier. Most people don’t buy everything at a little store like that, maybe get milk, ice cream, fruit or some item they need for dinner so they don’t have to go to a larger store and wait in line. The prices on dairy is good but everything is marked more than Walmart or Aldi (nearest grocery stores) have them marked. Their purchases added up to over $90. The man took his card and swiped it a couple of times and it wouldn’t register. Then he asked for a piece of cash register paper and put it over the card and swiped it a few more times. It didn’t register. Then he asked for a plastic bag and put it over the paper and swiped it a few more times. This took a few more minutes while we were waiting in line. They ended up having to remove the purchases from the cash register so I had to go to the other line. I thought it odd to begin with that they were buying so much at a little store plus the time the man took to keep swiping his card. I was thinking maybe he wanted someone to offer some cash to pay for it for them.