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Global Day of Action: Fast Food Rights Campaign
A McDonalds sign standing outside McDonalds in Salford, England, on April 15, 2015.
Jonathan Nicholson—NurPhoto/Getty Images

A teen in England had a strange experience with McDonald’s this week.

The teen, who goes by Ari on Twitter, went to a McDonald’s in the United Kingdom and realized she could have some fun with the kiosks meant to help people order food.

It turned out she could request all items be taken off a cheeseburger. This included not only add-ons like onions, ketchup, mustard and pickles, but also the patty and the bun.

When she removed all those items, Ari was left with, well, nothing. But the “sandwich” still cost her £0.99 — or about $1.27.

The cashier gave Ari the order, and it consisted of an empty bag. Fortunately, Ari found the whole incident funny, not frustrating. And others agreed — when she tweeted about it, the story quickly went viral.

“I tried it and paid for it to see what would come out, and this poor cashier calls me over five minutes later to ask me what I meant by my order,” Ari told Mashable.

TIME has reached out to McDonald’s to find out whether this was a one-time mistake or if all of the fast food giant’s kiosks allow customers to order nothing.